Hi
2015-10-20 19:34 GMT+02:00 Jamie Koceniak <jkocen...@mediamath.com>: > Version: > > > ----------------------------------------------------------------------------------------------- > > PostgreSQL 9.1.14 on x86_64-unknown-linux-gnu, compiled by gcc (Debian > 4.7.2-5) 4.7.2, 64-bit > > > > Query Plan > > http://explain.depesz.com/s/4s37 > > > > Normally, this query takes around 200-300 ms to execute. > > However when several queries are run concurrently, query performance drops > to 30-60 seconds. > > > there can be few reasons: 1. locking - are you sure, so your queries don't wait on locks? 2. issues with cache stability - is there high IO load? You can try to increase effective_cache_size (or decrease if you have not enough memory) Regards Pavel > >
