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W3 Total Cache
W3 Cache & Server Problems (9 posts)

  1. rnbjunkie
    Member
    Posted 3 years ago #

    I just know that it's not under
    constant stress. In normal situation it uses 1-1.5GB of available RAM
    and load average rarey reaches 5. It also runs smoothly for weeks until
    we get these peaks, the load gets suddendly high, memory is exhausted,
    the server starts swapping and it all freezes.

    I haven't been able to pinpoint what causes these peaks, although they
    seem to be related with the process of recreating the page cache.

    Regarding the page cache (which is set to disk) I noticed that in the
    past weeks it didn't seem to be correctly purged, as we reached 17k
    subdirs under wp-content/w3tc/pgcache (first level, not counting their
    subdirs) and a manual click on the empty page cache button only lead to
    a timeout (and a manual rm -rf took several minutes) -- also updating
    users details gave a never ending spinning working icon (I believe that
    w3tc hooks page cache purge to user edit).

    After changing some settings yesterday, the page cache seems to be
    purged, but the server is completely unstable. The main problem is that
    now I still haven't been able to revert to a stable situation, no
    matter what settings I use in w3tc.

    We have APC running on the server both for opcode caching and for manual
    caching of most widgets (this is done by our custom template).

    Let me know if you need more information

  2. rnbjunkie
    Member
    Posted 3 years ago #

    PS: We looking for other PHP developer to work on this issue

  3. rnbjunkie
    Member
    Posted 3 years ago #

    PS: We looking for other PHP developer to work on this issue

  4. Ramoonus
    Member
    Posted 3 years ago #

    what are your php memory and timeout settings?
    do you run a php cronjob?

  5. rnbjunkie
    Member
    Posted 3 years ago #

    Memory limit is 128MB, timeout 30 seconds.

    We tried different cron operations to purge the cache, but they didn't seem to help.

  6. Ramoonus
    Member
    Posted 3 years ago #

    which version of w3tc are you running?

  7. rnbjunkie
    Member
    Posted 3 years ago #

    Latest, non dev

  8. Stas Su?cov
    Member
    Posted 2 years ago #

    Hmm,
    you mentioned you got a lot of files/dirs created.
    Can you inspect server for the fs limits?
    Hint: /proc/sys/fs/*

  9. Frederick Townes
    Member
    Plugin Author

    Posted 2 years ago #

    Working on improving garbage collection in the next release.

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