mysqlcheck -h$host -u$user -p$pass --analyze $dbname
I wish that was the case!
I tried analyze table ... and optimize table ..., which I presume
would be the same. It did not help. I also ran mysqlcheck just to see
if it will make a difference. Nope!
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I had perfectly working complex queries both with LEFT JOIN and without
and they were returning results in under a second. After upgrade to
5.0.x, the same queries would return results in 20-30 second range.
Through trial and error, I discovered that in case of SELECT ... FROM
table1, table2 ...
Gmail User schrieb:
I had perfectly working complex queries both with LEFT JOIN and without
and they were returning results in under a second. After upgrade to
5.0.x, the same queries would return results in 20-30 second range.
possible you had set up some query cache in 4, but not currently
Here's a question that begs to be asked --
When you upgraded from 4.1 to 5.0, did you do an in-place upgrade, or mysqldump
your data and then re-import?
MySQL 5.x's query cache and table optimizers work very differently than in 4.1,
so the results you are getting are probably from 2 issues:
possible you had set up some query cache in 4, but not currently in 5?
may not be optimized, but yes, query cache is enabled, all 25 MB of it. :-)
how did you 'upgraded' your data?
regrettably, in-place.
interestingly, I was recovering after server crash that chopped of a
table. after
When you upgraded from 4.1 to 5.0, did you do an in-place upgrade, or mysqldump
your data and then re-import?
As replied to Sebastian's post, in-place.
Try using either mysqldump or mysql-administrator to dump out your data to an
.sql file. Then re-import all of your data into 5.x. You will
Gmail User wrote:
I had perfectly working complex queries both with LEFT JOIN and without
and they were returning results in under a second. After upgrade to
5.0.x, the same queries would return results in 20-30 second range.
I had a similar problem once (not related to 4.x-5.x though), it
