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Site very slow, High TTFB, what happened?

Discussion in 'Workarounds and Optimization' started by yu0307, Aug 11, 2017.

  1. yu0307

    yu0307 Registered

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    So I started to have this issue, Every page I load I notice there is a high TTFB (2-10s). Regardless if it's a brand new wordpress site or not. It seems that delay before first byte is always there.

    I suspect it's a Mysql or caching issue, but I turned on cache on both mysql and apache(opCache). there is no improvements.

    I'm running on Cent 7 with Cpanel 64. System is virtualized on VMware with 12 CPus and 64Gb memory. the Internet is fine, because i have another VM running on the same network and that webserver has no TTFB issue.

    I notice even uploading through SSH is a bit slow.

    Please help, or let me know how I can debug and find out the issue.

    Thank you
     
  2. cPanelMichael

    cPanelMichael Forums Analyst
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  3. yu0307

    yu0307 Registered

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    Hi, Thank you for your response, The reference did point out the issue.
    - Cached sites are super fast.
    -It's only slow when logged into wordpress and then visit the site.
    suspecting it's a apache and Mysql Issue.
    I read all the referencing site, the only suggestion is using litespeed which I don't want to do since it cost $2k to buy one with 8 cores. I'm going to try to upgrade to EA4 and PHP7 and see the result.
    Any further suggestions?
     
  4. cPanelMichael

    cPanelMichael Forums Analyst
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    Are you using any Mod_Security rules? If so, you may want to disable them to determine if they are the culprit, as was the case in this post:

    Extremely slow TTFB

    Thank you.
     
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