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Page Cache Blank Page Issue – Disk IO Related?

  • I know the issue of blank pages being served out of the cache has come up more than once – seems like it’s still an issue for some and not for others. Could slow disk IO be a potential cause? I am running 3 environments inside our network – each of which is running on its own Linux VM – and I’ve had my suspicions about the storage performance of our infrastructure in the past. Any time disk enhanced is enabled, I encounter the issue (occasional random page coming back blank – emptying the cache clears up the issue for that page, but it then reoccurs). Switching to APC for the page cache (which as I understand it, is completely in-memory) seems to correct the issue. Thoughts?

    http://wordpress.org/plugins/w3-total-cache/

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