Performance

IIS with several IPs

notabot — Mon, 02 Nov 2009 12:30:51 GMT

Hi. I have 2 network cards (local and external) on server and 2 web sites in IIS. First web site is used for files downloading and set to external IP. The second one is used for my admin panel and set to internal IP on port 8000. External channel is about 1 MB/s and when it is busy my admin site works very slow. CPU and hard disk loads are very low (It looks like IIS uses only one channel to access but I can access my local site only using local IP). What can I configure in IIS to speed up my local web site?

3GB switch and IIS 6.0 utilizing web gardening

jamescpk — Wed, 18 Nov 2009 17:25:33 GMT

Are there recommendations for or against using the /3GB switch in IIS 6.0? We are currently running three worker processes in a web garden with the 3GB switch enabled. We are considering disabling the 3GB switch, but increasing the number of worker processes in order to increase work-load per server. We are utilizing SQL Server session state.

IIS 6 performance tweak guide (draft)

Rovastar — Tue, 25 Mar 2008 16:07:54 GMT

Edit: The latest version of this guide is found here:

http://www.iisportal.com/articles-and-news/iis-60-performance-tweak-guide.aspx

=====

Hi folks,
I am starting to write a performance tweaking guide for IIS 6.0 (I have not used IIS 7 enough yet and it is not in the enterprise much atm).

I am a contractor and mostly now-a-days (for the past 7 years) I do IIS web support /architect stuff and this has prompted me to write a performance tweaking guide as I am doing performance review off my own back in my latest role and it will be a useful checklist for thing in a new role.

I found that often the information is all over the place in different MS documentation, blogs, articles, etc and that often they would shy away from placing values in them. Although obviously you should not change the metabase or registry for major changes without doing performance reviews, etc it is nice to have some guidelines of what to expect.
(I intend increasing this to include detailed monitoring, how to do benchmarking in conjection with this, security, etc for IIS, also one for SQL performance tuning in a web environment and hopefully how to debug IIS hangs and crashes)

Anyway I have slowly got something together and note a few things.
a) It is not finished yet.
b) See a)
c) It was written initially for a large intranet infrastructure I am working in atm so some specific may remain. I will remove these to more general terms (and I probably have some sentences in there that make little sense….sorry)
d) The grammar and spelling are probably off. I will go through this in more detail later.
e) Some of the technical detail may even be off. So please feel free to suggestion corrections.
f) There are things missing some of them obvious. If they are doing best practice where I am I have not written about it so there is more to add. Also things no things like PHP as they have no PHP.
g) I apologies as I am working away atm and I cannot upload this to my website so it is a cut and paste job. :( It will be uploaded later.

Any I would like as much feedback as possible and when it is finished hopefully I will publish it somewhere.

Let me know what you think

John

IIS 6.0 performance tweak guide (draft)

Standard Resource Toolkits on the servers

The basic installation of IIS doesn’t come with many useful tools for administration.

Consider installing the following additional software that should be installed on all web servers:

 Microsoft IIS Resource Kit

 Microsoft IIS Diagnostic Toolkit (and download the latest versions of the apps that come with these kits e.g. DebugDiag, LogParser)

 Microsoft Sysinternal Suite (stuff like process explorer, etc) http://technet.microsoft.com/en-gb/sysinternals/0e18b180-9b7a-4c49-8120-c47c5a693683.aspx

 Microsoft Network Monitor (latest version)

 A better text editor than standard notepad like notepad++

Standardise the build of the servers so they are basically the same.

Hosts

It is useful to be able to access the sites on your server from the server. This is useful for many reasons detailed error messages, traffic flow through the infrastructure so you know you are on the correct machine, etc.

Many production environments there may be firewalls and policies in place to stop you doing this if possible you should try and obtain this.

It may be as simple as trusting your own sites in Internet Explorer so they are allowed through hard admin

Often in farm environments it is useful to know the actual server that they you are on.

You could have many servers and the hardware load balancer that controls what traffic comes to which server sometimes isn’t helpful.

In this case it may be may be useful set up additional host headers and host files references on the production servers in the farms so you can directly access that specific server from its browser.

Make sure all the web farms files are in synch

Nightly checks of the webfarm files to make sure they are all in synch with each other.

We can script this for all the files or schedule tasks with a package like windiff to ensure they are all in synch. Send out mail alerts if they are found to be out of synch.

Additionally we can modify this so we can work out if staging is in synch with the production server farm. Obviously there will be some changes between the web configuration files but it is still a useful maintenance technique.

Also check these with the disaster recovery servers to ensure they are all in synch.

Checking the details of each websites config files (e.g. web.config, etc) and each server metabase file of the farm is also very useful. Obviously these things shouldn’t change but it would be useful to know if they did.

Luckily, Microsoft are in the process of writing an app for this and other purposes.

Web Deployment Tool (currently in a useable tech preview stage) has been designed for IIS7 and for migration from IIS6. But it also features a useful looking comparison tool to compare the states of multiple IIS6 servers.

http://www.iis.net/downloads/default.aspx?tabid=34&g=6&i=1602

Application Pool Recycling

By default an application pool has a recycle period of 1740 minutes or 29 hours. This is a ludicrous setting as it will be recycling application pools in peak times.

Much better is to recycle the application pools at fixed off peak times. For example - 1:00am.

For servers in farm environments stagger these recycle times so they are not all the same. E.g. Server A – 1:00am, Server B – 1:10am, Server C – 1:20am, etc

Additionally you can log when the app pools recycle. There are many reasons for a recycle and by default these are not recorded in the event viewer (very little is recorded by default for us admins). It is useful to have this for all events that occur.

Complete list:

AppPoolRecycleTime
AppPoolRecycleRequests
AppPoolRecycleSchedule
AppPoolRecycleMemory
AppPoolRecycleIsapiUnhealthy
AppPoolRecycleOnDemand
AppPoolRecycleConfigChange
AppPoolRecyclePrivateMemory

To turn them all on:

cscript adsutil.vbs Set w3svc/AppPools/DefaultAppPool/LogEventOnRecycle 255

HTTP Compression

This can be especially useful for static web content as the compression only has to be done the once and then cached. Dynamic content is compressed on the fly and not cached.

One of the main areas of usefulness of compression is the saving of the network traffic and thus a potential reduction for your hosting bills.

Although HTTP compression was previously more useful where there was less broadband and more dialup in years gone by. In today modern environment it is still a useful tool and should not overlooked. Increasingly people are also using mobile, wireless, etc in greater numbers and these will benefit much more with compression.

One of the previous downsides to HTTP compression years ago was that browsers did not support the HTTP 1.1 standards for this but from, I think IE5.5, they have been setting this ‘on’ as default.

(The benefits of an Intranet environment is that, in general, you have fewer multiple browsers to be concerned about as you are likely to know what company standard browsers are.)

Obviously static previously uncompressed content like HTML pages can benefit a lot from compression.

Although on an intranet the rewards of compression of web content should more than make up for small CPU overhead of producing the compression in the first place.

The server is not local and is in Ireland so people connecting to the UK intranet will benefit from the reduced amount of traffic. For quickly produced pages on the website the main area of slowdown for the user will the time it take to receive the pages across the network.

For the infrastructure here you will probably be saving 30% in network traffic overall (plain text files; HTML, ASP, JS, etc (we can configure in the metabase what files we want to compress beyond the default ones) will benefit from 50-60% size reductions for compression, jpegs, and other already compressed formats do not get compressed by default or do we want the extra processing power of compressing them) for a small increase in CPU time which still shouldn’t be more than double the current CPU load (which is very low nearly always below 5%) even maxed out.

Here is some sample data from Microsoft on the issue:

Blah blah blah

Default Documents order

This is a little anal but it is sadly a common occurrence. Place the actual ‘default content page’ of the website at the top of the list.

For example if you default page is

www.mywebsite.com/default.asp

then don’t have a default documents order of

Default.aspx
Default.htm
Default.asp
Index.htm

I know I am being a little anal as this is a small overhead in IIS where it looks first for the other files. As this happens every time, people could be going to them tens of thousands of times a day and it would (slowly) add up.

Now I don’t know if here all pages are referenced directly with full URLs in which case this is less relevant but still best practice and worthwhile implementing.

More detailed logging

By default and IIS site only has the standard default IIS logging turned on.

There are many more useful fields that we turn on and although these make the logs bigger can but very useful when you can query search through them. Often cookies is not need and is a large

True you can save some CPU time if you reduce what you log (especially with things like useragent) but the usefulness of these logs more than outweighs the benefit.

However to get this really useful you have to search it.

The LogParser tool is very useful however I would recommend going one step further and collating them if possible in a database.

This give you more scope and makes it very easy to troubleshoot.

(Although this is more useful as the types of problems are different in a large Internet environment rather than an Intranet one it is still very useful.)

Some example scenarios that it would have been really handy in the brief time I have been on the servers.

Troubleshooting a problem where we are investigating an unresponsive IIS server.

Often a sign of the impending problems might be in the logs might be a collection of 500 errors and failure can happen

To find out when the errors first occurred we can write queries on the log database for all servers in a particular farm.

We can narrow the searches down easily to a particular directory, server(s), refers, user, headers, http status codes (and in IIS 6 error sub-codes), etc.

Then we can see patterns in the 500 errors to see what occurred there.

This process is very difficult to do at present with flat logs when you are looking over days across a farm of multiple server and if you have to search large files over multiple parameters it nearly impossible.

There are very few tools for troubleshooting IIS web server problems and many of these have to run in real-time before the error occurs which is never ideal on a production machine (and we have to wait for the error to occur again)

So collating the IIS logs into a searchable form is a very useful tool.

Optimising connection timeouts

The default setting for a site is that a connection stays open for 120 seconds of inactivity before closing and the visitor will have a establish a new connection.

This is controlled on a per-site basis.

Website properties  Website tab.

Http Keep-Alives and connection timeout.

We are using the best practice of Keep-Alives how the time out period is that of the default. This is generally regarded as being too high. We should reduce this to 60 seconds (or less – many recommend 30 seconds) which is more realistic.

Caching

Optimising object cache TTL (time to live)

By default IIS hold every object in a cache for 30 seconds then it is discarded.

For a dynamic environment, like webappfarm, this is really not needed so the recommend best practice is that this can be reduced. I would say to 10 seconds.

Conversely for servers which hold a lot of static connect (the rest) it is recommended that this time is increased. I would say about 60 seconds some say longer.

This is control via the registry only and is sever wide.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\InetInfo\Parameters

Create ObjectCacheTTL as a Dword and assign the value (in seconds)

More Caching

IIS cache size is, by default, half the physical memory in the box (metabase reg - MemCacheValue). However there is a limit of the maximum size of each file held in the cache (metabase reg – MaxCachedFileSize) this by default is set to 256KB.

It is worth carefully checking the environment for commonly referenced files to see if any are over the 256KB default maximum. If we have a commonly accessed file that is over the limit then it makes sense to increase this limit.

Look out for large pictures on common pages and increasing rich media like flash and video clips.

Caching ASP content

aspScriptFileCacheSize is the amount of asp pages that by default this is 500. Heavy usage server with a lot of asp content could benefit from an increase in this value however there are various counters to monitor before we need to change the value (and other related values, asp cache to disk, etc). Here Microsoft explains:

http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/a9171159-c801-4705-b8a9-9eecf58a892f.mspx?mfr=true

Working set preferences

By default windows 2003 gives priority to the file system cache rather than the programs or working set.

It is generally recommended that you change to the working set (programs) rather than the file system.

This is common practice and highly recommend in say, an SQL Server environment, which have even more control of the memory resources in the program. IIS does benefit from this to a less degree hence why they do not turn it on as default as in SQL Server.

System Properties  Advanced tab  Performance  Advanced Tab  Memory Usage  Adjust performance for Program.

Additionally going hand-in-hand with this is changing the preferences of the network card to optimise file and print sharing for the network application data.

Initially, I thought, that as IIS serves files than a large system cache is needed. However IIS is a network file and application server not strictly a file server or an application server and therefore has more of a benefit for network priority.

Network Connections  Local Area Connection (for each connection)  Properties  File and Printer Sharing  Properties  Optimization  Maximize data throughput for network applications. – instead of file sharing which is default 2003 server setting (again SQL server machines will change the default to network apps)

Configure more detailed reporting in performance monitor

Configure Performance monitor to display associated process IDs instead of the incremental numbers (e.g. w3wp_5432 (where PID = 5432) instead of w3wp#1, etc) more details
http://support.microsoft.com/kb/281884

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PerfProc\Performance\

Create ProcessNameFormat as a Dword and assign the value 2

Configure the admin user settings

Although a personal preference, there are useful features that you can enable/disable for admin of an IIS server.

These include:

Turning off ‘Show Friendly HTTP messages’ in IE

Create a dedicated web admin config msc file for mmc – include iis, computer management, com, .net components and all things that you need.

In task manager turn on more columns
Most useful are:
ProcessID counter (so we can work out the name (with iisapp.vbs) of what worker process app pools are taking up the most resources) [this was turned off by default in Win2003]

Virtual Memory

Trivial this but I have always used 1.5 times (or more) the memory for virtual memory. Most of the IIS best practice document I have seen seems to indict this. I believe 1.5 times is the recommend windows amount for any windows server.

New to WCAT

JeanClaude68 — Wed, 16 Sep 2009 21:13:58 GMT

I need to stress a web site with multiple users to reproduce a weird crash. I've used WAS a few years back for something similar, but seems now WCAT is the tool to use. Been reading the doc, and some hits on the web and not sure what I might have missing.

This is my client.ubr

scenario
{
transaction
{

        id = "test"
        request
        {
            url = "/gwhatsnew.nsf/e68fd8d8c842d82849256a700023a723/746109ee414adc1a492573fa001435db?openDocument";
        }

}

When I run this line below

wcctl.exe -t client.ubr -s jdeslauriers4 -v 5 -c 1 -o wcat_log.xml -x

I get this print out below, and it just hangs there. The web site is not being triggers, and no Idea of what it is doing, and what I might be doing wrong.

Enabling debug flag(s) 2
Initializing performance counters...
'\\jdeslauriers4\Processor(_Total)\% Processor Time'... Success!
'\\jdeslauriers4\Processor(_Total)\% User Time'... Success!
'\\jdeslauriers4\Processor(_Total)\% Privileged Time'... Success!
'\\jdeslauriers4\System\Context Switches/sec'... Success!
Performance counter initialization complete.

Server: jdeslauriers4
Clients: 1

Thanks.

IIS 5.1 Connections

noctufaber — Wed, 11 Nov 2009 18:26:01 GMT

My boss wants to run an Intranet site on Windows XP (IIS 5.1) for a customer he's working with. The number of people using the Intranet at this location is estimated to be about 30. I'm raising the red flag here because of connection limitations in IIS 5.1. I'd rather use a Windows 2003 Server running IIS 6 and not have to worry about potential connection issues. My questions are these: 1. Is there a benchmarking tool available for monitoring and/or simulating connections to IIS 5.1? 2. If this is a ridiculous way to implement an Intranet server on Windows XP machine, can someone please let me know, and if possible refer me to any written articles or case studies explaining why or why not? Thanks, Dave

Webservices intermittent performance Issue

darrengreg — Wed, 11 Nov 2009 17:08:07 GMT

Hi,

I am experiencing intermittent performance problems running a simple webservice from a windows c# 2.0 client.

The bottleneck is occuring when the webservice attempts to de-serialize the returning dataset within the proxy class. On average every 1 in 20 requests take over a minute to complete, whereas normally this process completes in 1 or 2 seconds. The volumne of data sent from the webservice to the client is less than 1K.

I would expect the very first call to experience some overhead, however this is occuring if I attempt to make several calls consecutively.

My application uses IIS 6.0 (ASP.NET v2.0), my website that hosts the webservice uses application pooling with identity configured to a windows account.

As the issues ooccurs in the invoke method of the wsdl generated proxy class it leads me to think the problem lies with IIS configuration. Is there a known IIS performance tuning setting that is specific to webservices. I have tried the various configuration tweaks mentioned eg Application Pooling recycling, timeouts, limiting connections to 1 etc.

Any suggestions will be welcome and much appreciated.

Darren

Out of Memory errors

K-Dubb — Thu, 05 Nov 2009 15:46:27 GMT

I understand from MS that IIS6.0 has an issue with Memory Fragmentation that is supposed to be resolved in IIS7.0. In the meantime, has anyone found anything that will help remedy these out of memory errors?

A couple things I have tried:

-Reset IIS when the problem occurs.

-Schedule application pool recycles after hours.

As you can imainge, these are not the best of solutions. Is there anything else we can do to help with these, other than upgrade to Server 2008? They cause quite an issue for users of our web application.

Some background on our paticular sitation. We worked with MS for months on this issue and it was determined that we were suffering from Memory Fragmentation, which was to be fixed with IIS7.0/Server 2008. I am sure nobody has a magical fix, but just curious if anyone else uses another method to help remedy this situation.

Thanks.

Resource consumption on Windows 2003 and IIS 5.0

greenleaves — Fri, 30 Oct 2009 15:08:04 GMT

Hi All, I am new to the deployment world, I've been mostly on the development side of things. I am trying to figure out what would be the overhead (in terms of hardware resources, memory and resource consumption) if an application (.net 2.0 web app) is created on IIS 5.0 running on Windows 2003 box. I know it will depend on the size of the application. Are there any websites that show the statistics based on the application size and the version of OS and IIS. Any help would be greatly appreciated!!.

WCAT results

EdTijgen — Thu, 05 Nov 2009 08:30:55 GMT

Hi All,

I am using WCAT to test the performance of my ASP.NET web page unser IIS 5.1. In particular I am trying to see the difference in performance between a websites precompiled in debug mode and the same website precomiled in release mode.

However the results systematically show that the precompiled website in debug mode performs faster than the website precompiled in release mode. This can't be correct right? Please note that I have tried 3 different types of asp.net pages (1 totally empty doing nothing, 1 doing alot of calculations and 1 really heavy page using alot of LINQ to SQL) and the results are always, relativly, the same meaning that the precompiled website in debug mode always performs beter and shows less errors.

Can someone please help me interpret the results posted below?

My goal is to see for myself that a website precomiled in release mode performs beter than a website in debug mode. Can someone teach me how to do that please?

Regards,

Ed Tijgen

Precompiled Debug:

WCAT Version         = 5.2
ConfigFile           = config.txt
ScriptFile           = script.txt
DistribFile          = distribution.txt
PerfCounterFile      =
LogFile              = wcctl.log.log
Author               =
Creation Date        =
Test Run Date        = Wed Nov 04 17:28:30 2009

Comment              =
Server [IpAddr]      = [localhost]
Clients              = 1
Threads              = 200
Buffer Size          = 65536 bytes
Duration             = 60 seconds (Warmup 5 seconds, Cooldown 5 seconds)

Results:

                        Data, Summary, Rate, 127.0.0.1

                   Client Id,          0,       0.00,      1,
                    Duration,         60,       1.00,     60,
          Total Transactions,        341,       5.68,    341,
              Total Requests,       3530,      58.83,   3530,
             Total Responses,       3399,      56.65,   3399,
                Total 200 OK,        190,       3.17,    190,
          Total 30X Redirect,          0,       0.00,      0,
      Total 304 Not Modified,          0,       0.00,      0,
         Total 404 Not Found,          0,       0.00,      0,
      Total 500 Server Error,          0,       0.00,      0,
           Total Misc Status,       3209,      53.48,   3209,
          Redirect Responses,          0,       0.00,      0,
           Avg Response Time,       4236,      70.60,   4236,
           Min Response Time,          0,       0.00,      0,
           Max Response Time,      12953,     215.88, 12953,
        StdDev Response Time,       2439,      40.65,   2439,
              Total Connects,       3595,      59.92,   3595,
            Avg Connect Time,        718,      11.97,    718,
            Min Connect Time,          0,       0.00,      0,
            Max Connect Time,       2141,      35.68,   2141,
         StdDev Connect Time,        501,       8.35,    501,
              Connect Errors,       3059,      50.98,   3059,
              Receive Errors,          0,       0.00,      0,
                 Send Errors,        151,       2.52,    151,
      Internal Memory Errors,          0,       0.00,      0,
           No Headers Errors,          0,       0.00,      0,
       No Status Code Errors,          0,       0.00,      0,
           Bad Status Errors,       3209,      53.48,   3209,
Bad Response Header Errors,          0,       0.00,      0,
    Bad Response Data Errors,          0,       0.00,      0,
No Redirect Location Errors,          0,       0.00,      0,
Bad Redirect Location Errors,          0,       0.00,      0,
                   Data Read,   13145414, 219090.23, 13145414,
                Header Bytes,     497098,    8284.97, 497098,
                 Total Bytes,   13642512, 227375.20, 13642512,
         Avg Header per Page,       1457,      24.28,   1457,
          Avg Bytes per Page,      40007,     666.78, 40007,

             Files Requested,       3530,      58.83,   3530,
                  Files Read,        190,       3.17,    190,

Per Class Statistics:

                   1 Fetched,        341,       5.68,    341,
                   1 Errored,       3189,      53.15,   3189,
                   1 distrib,      10000,     166.67, 10000,

Precompiled Release:

WCAT Version         = 5.2
ConfigFile           = config.txt
ScriptFile           = script.txt
DistribFile          = distribution.txt
PerfCounterFile      =
LogFile              = wcctl.log.log
Author               =
Creation Date        =
Test Run Date        = Wed Nov 04 17:36:53 2009

Comment              =
Server [IpAddr]      = [localhost]
Clients              = 1
Threads              = 200
Buffer Size          = 65536 bytes
Duration             = 60 seconds (Warmup 5 seconds, Cooldown 5 seconds)

Results:

                        Data, Summary, Rate, 127.0.0.1

                   Client Id,          0,       0.00,      1,
                    Duration,         60,       1.00,     60,
          Total Transactions,        199,       3.32,    199,
              Total Requests,       3989,      66.48,   3989,
             Total Responses,       3966,      66.10,   3966,
                Total 200 OK,        183,       3.05,    183,
          Total 30X Redirect,          0,       0.00,      0,
      Total 304 Not Modified,          0,       0.00,      0,
         Total 404 Not Found,          0,       0.00,      0,
      Total 500 Server Error,          0,       0.00,      0,
           Total Misc Status,       3783,      63.05,   3783,
          Redirect Responses,          0,       0.00,      0,
           Avg Response Time,       5080,      84.67,   5080,
           Min Response Time,          0,       0.00,      0,
           Max Response Time,      16891,     281.52, 16891,
        StdDev Response Time,       2908,      48.47,   2908,
              Total Connects,       4134,      68.90,   4134,
            Avg Connect Time,        304,       5.07,    304,
            Min Connect Time,          0,       0.00,      0,
            Max Connect Time,       1484,      24.73,   1484,
         StdDev Connect Time,        359,       5.98,    359,
              Connect Errors,       7559,     125.98,   7559,
              Receive Errors,          0,       0.00,      0,
                 Send Errors,         16,       0.27,     16,
      Internal Memory Errors,          0,       0.00,      0,
           No Headers Errors,          0,       0.00,      0,
       No Status Code Errors,          0,       0.00,      0,
           Bad Status Errors,       3783,      63.05,   3783,
Bad Response Header Errors,          0,       0.00,      0,
    Bad Response Data Errors,          0,       0.00,      0,
No Redirect Location Errors,          0,       0.00,      0,
Bad Redirect Location Errors,          0,       0.00,      0,
                   Data Read,   15480335, 258005.58, 15480335,
                Header Bytes,     577080,    9618.00, 577080,
                 Total Bytes,   16057415, 267623.58, 16057415,
         Avg Header per Page,       2899,      48.32,   2899,
          Avg Bytes per Page,      80690,    1344.83, 80690,

             Files Requested,       3989,      66.48,   3989,
                  Files Read,        183,       3.05,    183,

Per Class Statistics:

                   1 Fetched,        199,       3.32,    199,
                   1 Errored,       3790,      63.17,   3790,
                   1 distrib,      10000,     166.67, 10000,

streaming video in IIS

rfwilliams777 — Mon, 26 Oct 2009 21:34:52 GMT

I have a couple of sites that stream WMV and one that streams FLV videos. I have a windows 2003 server (Standard Edition, all the latest service packs and updates). I have noticed that after the videos play a few times, they no longer play until I run the iisreset, reboot the server, or restart the AppPool process for the sites. What kind of settings or suggestions do you have that will allow me to stream and not have to physically involve myself with restarting these things?

FTP client times out on directory change

computerlady911 — Tue, 27 Oct 2009 19:20:45 GMT

Every time I connect to my ftp server, the connection initially works fine but if I click on any directory the client times out the first time. If I wait until after I get the error, then try again it will work. I am using IIS6 for the ftp and filezilla for the client.

This is how the filezilla reports the command and error.

Command:    CWD /folder name/folder name/Folder Name
Error:    Connection timed out
Error:    Failed to retrieve directory listing

I increased the timeout settings to 1200 sec but no change. Again it does work the second time I try to click on the folder. But this is not a satisfactory result for my users. It happens on every folder.

DefaultAppPool causing 100% CPU

Koski — Fri, 23 Oct 2009 15:32:17 GMT

Hi all,

We currently run a Win2k3 server with IIS 6.

There are approximately 175 sites on this particular box, most of them ASP.NET. We have them divided into a number of containers to make recompiles more manageable. Since this morning we've had one instance of w3wp.exe which is keeping CPU pinned at 100%. I've run iisapp.vbs and narrowed it down to the DefaultAppPool. Queued connections are also climbing and sites are extremely slow to load (seemingly regardless of which container they are in).

Any ideas would be hugely appreciated.

Indexing service

bendoregon — Wed, 21 Oct 2009 12:51:25 GMT

We are hosting a few classic asp websites on a 2003 server running IIS 6; we are trying to squeeze a little more performance out. Is there any reason indexing service should not be disabled? If not, would disabling free up resources and help increase performance?

IIS becomes very slow and generates message - SQL Server does not exist -

Jvdplas — Thu, 08 Oct 2009 14:29:58 GMT

Hi,

We are using a IIS 6.0 on a W2k3 machine, connecting via ODBC/TCP towards a SQLServer 2000 running on a W2k machine. The IIS 6.0 website becomes very slow and we receive messages like 'SQL Server does not exist' whenever Requests.Executing shows between 5 and 10 ( it seems more 10 then 5 ). Worth mentioning that we have the same website also running on IIS 5.0/W2K to the same SQL Server with on average the same load without any issues.

Although we have implmemented most changes mentioned, we have not yet gained any performance.

Which setting did we oversee ......

PS. We are located in NL / Hilversum and are willing to invite you if you think you are the IIS guru who can fix this issue.

Virtual Directories

darpan_dewan — Thu, 08 Oct 2009 22:55:43 GMT

Hi, I am using IIS 6.0 I have following questions
1) I am not sure is it good to have too many virtual directories under one website? If yes then why and if no then why?
2) Are their any disadvantages of using virtual directory?
3) How to stop only one specific virtual directory?

Regards'
Darpan Dewan

application Pool problem

satya.ambatipudi — Thu, 17 Sep 2009 13:26:44 GMT

hello,

i am using iis 6 and windows server 2003. my applicaiton pool getting stopped frequently.

Please help me out.

Can't get compression to work on 1 site - application pool issue?

pjsmith — Wed, 07 Oct 2009 15:15:05 GMT

Hi,

I've got compression enabled on our IIS6 server. It works fine for most sites. The main intention was to get .js and css to compress. I have 2 sites. 1 runs on the default applciation pool, one on a custom one which runs under another identity. The same .js file will be supplied compressed from the site running under the default applciation pool, but not the one with the different identity. The first runs as 'network service', the second a local user account. I suspect this has somthing to do with it, though I'm confused as the web page itself is served compressed from the second site. It's only the supporting files like .css and .js that are not.

I've checked permissions on gzip.dll etc, but cannot see any reason why this does not work.

Is there anything I need to do if running on a different app pool and indentity to get this to work for supporting files?

Thanks.

IIS6 Requests Viewer duplicate Request ID?

yuewah — Tue, 25 Aug 2009 02:26:45 GMT

I am using IIS6 , my web application is asp.net 1.1 and configure as web garden with two worker processes.

Occasionally, it might have many duplicate request ID in IIS6 Requests Viewer. Is It abnormal ?

Local website access is very slow

coolgani — Wed, 30 Sep 2009 11:48:24 GMT

Hi all,

I am using win2k3 sbs.I am running IIs webserver on this machine with different application like .Net and php websites.from last 4 days accessing local websites on this machine became very slow.I do not understand what the problem is?.Processor time,Avg diskqueue length,Num of pages/sec are normal.Please tell me the procedure to troubleshoot this issue and how to improve the performence of the server.

Regads

------------

Ganesh

Preload web application after WP recycle

renMike — Mon, 21 Sep 2009 08:01:37 GMT

Hello,

I have a third party web application (well suite of them) that we have bought and host on two of our web servers (IIS6 & IIS7). The web application is .NET based but uses a lot of Java on the pages. My users are complaining about the length of time it takes to logon in the morning to this site and so I thought I would disable the 'Shutdown worker process if idle' setting and force the application pool to recycle each night. My aim was then to call the logon page via an automated script shortly after the recycle to preload the web application into the cache. Unfortunately for me this doesn't seem to be working quite as intended and the users still get the long wait for the logon page, but once the first user is in then subsequent requests are a lot quicker.

Here's the script i was trying to use:

:: Prevent any spaces in the batch from being read
@echo off

:: Start Internet Explorer and request it displays the main InfoView page
start http://myserver/InfoViewApp/listing/main.aspx

:: Delay this script for a length of three minutes to allow page to load
:: -n 181 = 181 pings, now + 180, each lasting 1 second (i.e. 3 minutes)
:: -w 1000 = timeout of 1000 milliseconds to wait for each reply
:: > nul = a redirection to nul which effectivly suppresses the ping reports
ping 127.0.0.1 -n 181 -w 1000 > nul

:: Forcefully close down any Internet Explorer processes that are running
taskkill /F /im iexplore.exe

I get the impression that this line of reasoning is not invalid, but I haven't yet found a suitable way of implementing it.

If anyone can confirm or debunk my idea that would be great.
Likewise, if anyone can point me in the right direction to preload my site that would also be great.

Thanks,

Mike

Out of Memory Exception - Help us

DaraPuth — Wed, 26 Mar 2008 12:48:46 GMT

Concerned,

Am heading a team developping a web application using VS2005+vb.net. The team consists of about 17 to 20 developers depending on the need. Our IIS 6.0 is often throwing an error as "Out of Memory", though we have taken many-a-steps as
1) Increasing the RAM of the server to 4GB
2) Isolating the Server only for our App
3) ReCycling all Cache objects as well as Session Objects
4) Implementing IDisposable on major objects of our application
5) Enabling Client GC
blah.. blah..

keeping this in regards, Can some one help me out how to debug / trace / identify the memory loopwhole.

Apart of all, help me to understand, how to scan the memory footprint at IIS.

Thanks for reading this.

Query reagrding Web Application Stress Tool

AppiBoss — Thu, 24 Apr 2008 04:40:30 GMT

Hello,

I am working on Microsoft Web Application Stress Tool version 1.1.293.1 and i am able to generate reports of the result by using sample scripts, but Perf Counters section in my tool is not showing any counter and hcounters.csv is also missing. I also want to know, how to use this tool in web farm environment? May be some links which would give good information regarding it.

Anticipating your reply.

Thanks

Name: ArpitKumar Jain

Current Connections vs. Active Connections

SkippingAdi — Mon, 07 Sep 2009 10:03:14 GMT

Hi all

Windows Server 2003 Enterprise Edition
IIS 6.0

If I watch the values vor "Current Connections" and "Active Sessions" with PerfMon then I see 8 current connections but about 100 Active Sessions. Session time out is configured on IIS/Web.config of the web app for 2 minutes.

So my understandig is, that the Active Session value should decrease after a few minutes if there are not comming some new connections, isn't it?

Why do I see this large difference?

Thank you for your help.

Regards
Adrian

Website not responding

manishsingh — Fri, 11 Sep 2009 11:40:45 GMT

My webserver which is hosting multiple site on IIS 6.0 is getting stucked after few hours..the static pages is coming from webserver but the pages whic are dynamic is not responding..it again comes up only when we recycle the Application pool for the sites from IIS..

Asp.net framework2.0, SQL server2005 and IIS6.0

Please help Thanks in advance ....

Service Unavailable isu....

ahmad.osama — Thu, 03 Sep 2009 06:55:09 GMT

Users are getting the service unavailable msg in a web app....this is the corresponding msg in event log. A process serving application pool 'DefaultAppPool' exceeded time limits during shut down. The process id was '140'. We are using sql server session state for storing sessions, so the expected behavior is that the pool recycles shouldn't affect the sessions.