[PHP] rather a mysql question

Sorry that this is more of a mysql question, but since most php programmers use it a lot, i though i might find the answer without subscribing to mysql list, here goes: When i do a query from a big table using indexes,it takes for example 5 seconds. Now if i, after some time repeat the query, the

RE: [PHP] rather a mysql question

[snip] When i do a query from a big table using indexes,it takes for example 5 seconds. Now if i, after some time repeat the query, the query takes about 0.5 secs. So far i thought it was because of caching, but now i read mysql (v3.23) doesnt support query cache. So this really gets me

Re: [PHP] rather a mysql question

Depending on your OS, there's a good possibility that the OS is caching HD data. So instead of mysql reading directly from disk, it's getting it from the memory cache. Depending on how heavily your server is used, wait 10 or 15 mins (to let the memory cache clear out) and try it again.