Seeing the query would help.
Are you using sub-queries? I believe that those can make the time go
up exponentially.
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On Jul 19, 2007, at 2:19 PM, Rob Adams wrote:
I have a query that I run using mysql that returns about 60,000
plus rows. It's been so large that I've just been testing it with a
limit 0, 10000 (ten thousand) on the query. That used to take
about 10 minutes to run, including processing time in PHP which
spits out xml from the query. I decided to chunk the query down
into 1,000 row increments, and tried that. The script processed
10,000 rows in 23 seconds! I was amazed! But unfortunately it
takes quite a bit longer than 6*23 to process the 60,000 rows that
way (1,000 at a time). It takes almost 8 minutes. I can't figure
out why it takes so long, or how to make it faster. The data for
60,000 rows is about 120mb, so I would prefer not to use a
temporary table. Any other suggestions? This is probably more a
db issue than a php issue, but I thought I'd try here first.
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