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06.25.2008 at 03:38PM PDT, ID: 23516491
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8.4

Second MySQL search always faster  - preload db into cache?

Asked by xfvgdrthbdtyvhgscv in MySQL Server, Databases Miscellaneous, SQL Query Syntax

Tags:

Hello all,

I have a somewhat large (600Mb) MySQL database with many many tables, a web browser user interface, and Perl middleware that queries the DB and returns the results to the user.

I've noticed that a user's second query always returns results much faster than his first query of the session.  That is, he surfs to the query page, inputs some options, hits "go" and it takes 'X'-seconds for teh results.  If he then inputs some other parameters and searches again, the results are back in ~X/3 seconds.

This holds true even if teh second query has nothing to do with the first, other than that it's using teh same database.

It's as if during the first query the db is loaded into cache and persists there for a while, making the second go faster.

Is this true?  And if so, is there a way for me to "preload" the DB as soon he arrives at teh query page the first time, before he's submitted his first query?  For example, if I had an arrival script tha ran some simple, meaningless query on the DB upon arrival, woudl that do it?

Thanks.Start Free Trial
[+][-]06.25.2008 at 03:44PM PDT, ID: 21870491

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[+][-]06.26.2008 at 06:22AM PDT, ID: 21874477

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Zones: MySQL Server, Databases Miscellaneous, SQL Query Syntax
Tags: Mysql
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Solution Provided By: virmaior
Participating Experts: 2
Solution Grade: B
 
 
[+][-]06.28.2008 at 02:22PM PDT, ID: 21892073

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[+][-]06.28.2008 at 02:35PM PDT, ID: 21892099

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[+][-]06.28.2008 at 05:50PM PDT, ID: 21892552

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