OPCache wasted memory grows rapidlyRSS

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  alexandros_k

  32 Posts

  OPCache wasted memory grows rapidly

  Nov 08, 2020 02:28 PM|alexandros_k|LINK

  Hi there,

  I run PHP 7.4.12 on a Windows 2019 IIS10 server.

  For some reason, the wasted memory value in PHP Opcache grows rapidly.

  For example, these are the statistics after 30mins since the last webserver reset:

  total memory: 2.00GB
  used memory: 89.00MB
  free memory: 1.66GB
  wasted memory: 261.36MB (12.76%)

  And these are my settings:

  opcache.memory_consumption=2048
  opcache.cache_id=oc1
  opcache.error_log="D:\temp\php\opcache_errors.log"
  opcache.validate_timestamps=1
  opcache.revalidate_freq=90
  opcache.interned_strings_buffer=32
  opcache.save_comments=0
  opcache.max_file_size=0
  opcache.file_update_protection=0
  opcache.file_cache_consistency_checks=0
  opcache.file_cache="D:\temp\php\opcache_filecache"
  opcache.max_accelerated_files=100000

  If I leave it to run more time, the wasted memory could fill up my entire 2GB allocated to Opcache.

  Why does this happen? is it an opcache bug?

  Thanks

  Alex