On Thu, 2006-09-14 at 09:00, Jérôme BENOIS wrote: > Hi Guillaume, > > Le jeudi 14 septembre 2006 à 15:46 +0200, Guillaume Smet a écrit : > > On 9/14/06, Jérôme BENOIS <benois@xxxxxxxxxxxxxxxxxxxx> wrote: > > > I migrated Postgres server from 7.4.6 to 8.1.4, But my server is > > > completely full, by moment load average > 40 > > > All queries analyzed by EXPLAIN, all indexes are used .. IO is good ... > > > > What is the bottleneck? Are you CPU bound? Do you have iowait? Do you > > swap? Any weird things in vmstat output? > the load average goes up and goes down between 1 and 70, it's strange. > IO wait and swap are good. I have just very high CPU load. And it's user > land time. > > top output : > > top - 15:57:57 up 118 days, 9:04, 4 users, load average: 8.16, 9.16, > 15.51 > Tasks: 439 total, 7 running, 432 sleeping, 0 stopped, 0 zombie > Cpu(s): 87.3% us, 6.8% sy, 0.0% ni, 4.8% id, 0.1% wa, 0.2% hi, > 0.8% si > Mem: 2076404k total, 2067812k used, 8592k free, 13304k buffers > Swap: 1954312k total, 236k used, 1954076k free, 1190296k cached > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 15667 postgres 25 0 536m 222m 532m R 98.8 11.0 1:39.29 postmaster > 19533 postgres 25 0 535m 169m 532m R 92.9 8.3 0:38.68 postmaster > 16278 postgres 25 0 537m 285m 532m R 86.3 14.1 1:37.56 postmaster > 18695 postgres 16 0 535m 171m 532m S 16.1 8.5 0:14.46 postmaster > 18092 postgres 16 0 544m 195m 532m R 11.5 9.7 0:31.87 postmaster > 16896 postgres 15 0 534m 215m 532m S 6.3 10.6 0:27.13 postmaster Somewhere, the query planner is likely making a really bad decision. Have you analyzed your dbs?
