Recently we upgraded from MySQL 4.1.11 to MySQL 5.0.22. The queries are taking a lot of
time to execute in the newer version. The queries which were executing within 10 secs are
now taking more than 100 secs.
Running an expalin on the queries showed that an index_merge optimization is being used
which is a new concept in MySQL 5. My initial doubt was on this but now when I checked top
it shows that mysqld is consistently using 59% of Memory and 25% of cpu even when there is
the SHOW STATUS command in mysql shows:
Running a SHOW VARIABLES shows:
It is evident that mysqld is creating a lots of threads... Could this be the problem?
Ratheesh K J