I suspect you will get much faster results if you update just one table with all three pieces of data in it. Also, as others have said, make sure you have an index on whatever you use in your WHERE
clause for the UPDATE
. And, if your count_cross
column is the sum of count_in
, just leave it out and calculate it when you need it; this will help (at least a little) if reads are much less frequent than writes.
In my tests elsewhere in this thread, I was able to get about 132K updates/min out of MySQL on a 2-CPU 1GHz Pentium III, so unless your machine is much slower there is probably some performance to be found somewhere.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||