mysql query takes 145 seconds
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Published on 2012-06-28T09:14:53Z
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I have a a mysql db with myisam engine. Along with many other table I have this table "et" which has around 8137037 records.
I have created indexes (individual index of column hname and pnum, it did not help much later created joint index of hname and pnum and it help execute within a second)such that queries like "select st from et where hname='name' and pnum='1' limit 1;" execute fast (with in a second) but the problem is I must execute this query "select st from et where hname='name' and pnum='1' order by id limit 1" where id is the primary key of the table and this query sometimes take 145 seconds :(
how can i resolve this issue?
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