On Wed, Mar 30, 2022 at 12:52:05AM +0530, Rambabu g wrote: > > What indexes are defined on this table ? > > How large are they ? > > There are three indexes defined on the table, each one is around 20 to 25GB > and the indexes is create on Did you mean to say something else after "on" ? Show the definition of the indexes from psql \d > postgres=# explain select distinct empno from emp where sname='test' and tp='EMP NAME 1' Is this the only query that's performing poorly ? You should send explain (analyze,buffers) for the prolematic queries. > > > Hypervisor vendor: KVM > > > > Are KSM or THP enabled on the hypervisor ? > No, the Ec2 VM is delicate to postgres DB instances only. Oh, so this is an EC2 and you cannot change the hypervisor itself. > -bash-4.2$ tail /sys/kernel/mm/ksm/run /sys/kernel/mm/transparent_hugepage/khugepaged/defrag /sys/kernel/mm/transparent_hugepage/enabled /sys/kernel/mm/transparent_hugepage/defrag ... > ==> /sys/kernel/mm/transparent_hugepage/defrag <== > [always] madvise never I doubt it will help, but you could try disabling these. It's a quick experiment anyway.
