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[Solved] Sometimes Long Time to First Byte Time for the first request
11-12-2013, 07:24 PM (This post was last modified: 11-12-2013 10:51 PM by robzilla.)
Post: #8
RE: Sometimes Long Time to First Byte Time for the first request
Could be poor disk performance. When you're testing the site and php-cgi takes roughly 28% of CPU, what's the CPU doing? Is it waiting for the disk? (%wa in top) You can use tools like hdparm (e.g. hdparm -tT /dev/vda1) or ioping to get a basic idea of disk performance, or something like fio for a more thorough analysis.
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RE: Sometimes Long Time to First Byte Time for the first request - robzilla - 11-12-2013 07:24 PM

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