Weird performance issues

  • Hi,

    i’m working on some weird performance problems with wordpress for several weeks now and thought i’ll post them here – maybe someone has already heard from that.

    I got two wordpress installations on the same server (my own dedicated server so i have a clear overview of resource usage). Both sites run an nearly identical set of plugins.

    site 1) gets about 5.000 unique visitors a day and around 8.000 PI.
    site 2) gets about 12.000 uv’s and 20.000 PI.

    site 1) has about 600 pages and subpages in 2 levels.
    site 2) has about 200 pages and subpages in 2 levels.

    The problem is that when editing pages in site 1 it takes way longer to publish/unpublish them then in site 2. When i do a quick edit on a page on site 2 and change from draft to publish – when hitting save it takes about a second to save. On site 1 this takes about 10 seconds. Basically not a big problem but the cause of this problem seems to cause much more trouble at all. One thing is that this sites often gets 10 pages at once published which is impossible because php runs into a timeout before the publish is finished. Also this eats up lots of resources on the server.

    I use W3 total cache on both sites but on site 1 whenever a url isn’t cached it eats up loads of cpu to render the page. I suppose this due to the same problem that leads to that strange publish delay on the pages.

    I’ve already done a complete fresh installation of wordpress, importing the posts and pages from site 1 via ex/import function of wordpress. I’ve not installed any plugins at first and have already seen that ugly delay when editing pages. I’m really stumped as i can’t imagine where this comes from. Can the amount of pages (just around 600) really be a problem here? Then why doesn’t this happen on posts (around 1.700 posts in the database).

    The only other difference is the content of the pages, but this can’t be a problem, can it? At least i can’t imagine…

    Anyone with an idea? Thanks for helping!

    Frank

Viewing 3 replies - 1 through 3 (of 3 total)

  • Does this problem still occur with the twentyten theme and/or with all other plugins except W3TC activated?

    Have you checked your error log for errors like if memory limits have been exhausted?

    Thread Starter helmi

    (@helmi)

    Hi Frederick,

    this problem even occures with all plugins deactivated and the standard theme. In between i could narrow it down to permalinks.

    When i switch permalinks off the whole problem is gone. Looks like the amount of pages in combination with permalinks switched on is the problem.

    Can you submit a bug submission form from the support tab of the plugin?

Viewing 3 replies - 1 through 3 (of 3 total)
  • The topic ‘Weird performance issues’ is closed to new replies.