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Terrible TTFB Times
07-23-2012, 11:03 AM
Post: #2
RE: Terrible TTFB Times
Unfortunately TTFB is largely a black box from the outside and the only way to get visibility into it is to instrument the app itself.

An F for 0.6 seconds is pretty safe to ignore. I have a thread about it somewhere here but the target time is calculated based on a multiple of the socket connect time (with that being used as an estimate for the round trip time to the server). With cloudflare the socket connect time is quite a bit shorter than the actual round trip time to the real server so the target gets set artificially low.

That said, the times where you see it > 1 second are cause for concern (even 0.6s is on the high end for a fast site but not bad for wordpress if you are on shared hosting).

If you are on dedicated hosting or a VPS and have dev skills, I HIGHLY recommend installng New Relic on the server. The pro offering is free for 2 weeks which should be long enough to find the hot spots (and then you can either pay to keep the pro level or let it degrade to a free account). It will pretty much tell you what the slow spots are right away.

If you are on shared hosting or don't want to install a full APM solution you can install a plugin that will log the performance of various wordpress activities and it will tell you the slow spots. W3 total cache has a debugging option and there are others as wel (debug queries I think is one).

The root cause is likely going to be one or more of these:
- Overloaded database + slow/many queries
- External web services calls to other systems
- Overloaded web server
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Messages In This Thread
Terrible TTFB Times - amart41 - 07-21-2012, 08:55 AM
RE: Terrible TTFB Times - pmeenan - 07-23-2012 11:03 AM
RE: Terrible TTFB Times - amart41 - 07-23-2012, 11:37 AM
RE: Terrible TTFB Times - pmeenan - 07-23-2012, 11:43 AM
RE: Terrible TTFB Times - amart41 - 07-24-2012, 12:42 AM
RE: Terrible TTFB Times - pmeenan - 07-24-2012, 01:18 AM
RE: Terrible TTFB Times - amart41 - 07-24-2012, 02:46 AM
RE: Terrible TTFB Times - pmeenan - 07-24-2012, 03:23 AM
RE: Terrible TTFB Times - pmeenan - 07-24-2012, 03:24 AM
RE: Terrible TTFB Times - amart41 - 07-24-2012, 03:45 AM
RE: Terrible TTFB Times - pmeenan - 07-25-2012, 01:02 AM

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