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How to improve Time To First Byte?
03-01-2011, 08:00 AM
Post: #4
RE: How to improve Time To First Byte?
There could be a couple of causes - if you haven't already, one good way to track it is to enable response time tracking in your access logs (if you're on Apache anyway). That way you can see how long the server thinks every request took to process.

Even if the web server itself isn't overloaded, it's possible the mysql server is (most hosting providers run the database servers on different machines). Does the 1x1 pixel itself have any code behind it to do logging or is it all taken from the access logs? Or if the files are stored on SAN or NFS it's possible that there was a hiccup there.

The other possibility is packet loss. If one of the request or response packets get lost you could see a longer time (though usually it's only really painful for the actual connect time, not the requests themselves since TCP has a better RTT estimate by then).
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RE: How to improve Time To First Byte? - pmeenan - 03-01-2011 08:00 AM

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