performance and errors on DreamHost

  • I’m seeing some very troubling performace/latency issues/errors on a (dedicated) site (https://ums.org) I’ve hosted with DreamHost. Issues are intermittent and include 404, 503, and 500 errors. At times the front-end will be barely accessible and the back-end will be completely inaccessible (perhaps thanks to W3 Total Cache). As far as can be determined the code-base seems solid, but in various logs I am seeing a lot of

    PHP Warning: xcache_set(): XCache var cache was not initialized properly. Check php log for actual reason

    and

    Premature end of script headers: index.php

    This is the first time I’m seeing this issue with DreamHost, despite the fact I’ve hosted similarly complicated sites with mostly the same plugins there previously. This site is pretty mission critical, does anyone have any insight into this issue or how it might be addressed? (In the very beginning an Apache restart temporarily alleviated the issue.)

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  • Mika Epstein

    (@ipstenu-dh)

    DreamHost Rep

    If you’re trying to use W3 Total Cache’s interface with our install of Xcache, it won’t work right now :/

    I saw you’re on PHP 5.4, so I went and bumped your PHP memory to see if that would help any.

    Thread Starter joshw_at_phire

    (@joshw_at_phire)

    Thanks! (It seems to partially address the problem, but not completely.)

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