Rob Adams napsal(a):
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.
60k rows is not that much, I have tables with 500k rows and queries are
Anyway we cannot help you if you do not post:
1. "show create table"
2. result of "explain query"
3. the query itself
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