Re: testing HS/SR - 1 vs 2 performance
Mark Kirkwood <mark.kirkwood@catalyst.net.nz>
From: Mark Kirkwood <mark.kirkwood@catalyst.net.nz>
To: Greg Smith <greg@2ndquadrant.com>
Cc: Erik Rijkers <er@xs4all.nl>, Simon Riggs <simon@2ndQuadrant.com>, Tom Lane <tgl@sss.pgh.pa.us>, Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>, pgsql-hackers@postgresql.org
Date: 2010-04-22T21:54:55Z
Lists: pgsql-hackers
Greg Smith wrote: > Erik Rijkers wrote: >> This is the same behaviour (i.e. extreme slow standby) that I saw >> earlier (and which caused the >> original post, btw). In that earlier instance, the extreme slowness >> disappeared later, after many >> hours maybe even days (without bouncing either primary or standby). >> > > Any possibility the standby is built with assertions turned out? > That's often the cause of this type of difference between pgbench > results on two systems, which easy to introduce when everyone is > building from source. You should try this on both systems: > > psql -c "show debug_assertions" > > > Or even: pg_config --configure on both systems might be worth checking. regards Mark