Re: Memory usage after upgrade to 9.2.4

On 04/21/2013 06:37 AM, Daniel Cristian Cruz wrote:
> 2013/4/21 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us <mailto:tgl(at)sss(dot)pgh(dot)pa(dot)us>>
>
> Tomas Vondra <tv(at)fuzzy(dot)cz <mailto:tv(at)fuzzy(dot)cz>> writes:
> > I do have a log with the memory context info printed after the OOM
> > killed the session - see it attached.
>
> The only thing that seems rather bloated is the CacheMemoryContext,
> which seems to be because the backend has cached info about several
> thousand tables and indexes. Given that you say there's 9500 relations
> in their schema, it's hard to believe that 9.2.4 is suddenly doing that
> where 9.2.3 didn't. I'm wondering if they've done something else that
> restricted the amount of memory available to a backend.
>
>
> Maybe, since I'm running the same server and top shows a RES size a bit
> large for idle sessions. Not so large than 9.2. Bellow is the actual
> server top.

Just to be clear the below is for the 9.1.4 server you rolled backed to?

>
> top - 10:30:35 up 385 days, 14:35, 1 user, load average: 1.48, 1.32, 1.28
> Tasks: 668 total, 5 running, 663 sleeping, 0 stopped, 0 zombie
> Cpu(s): 10.3%us, 0.7%sy, 0.0%ni, 87.6%id, 1.3%wa, 0.0%hi, 0.1%si,
> 0.0%st
> Mem: 98923768k total, 95618640k used, 3305128k free, 232888k buffers
> Swap: 49150856k total, 264284k used, 48886572k free, 91567048k cached
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 32497 pg91 15 0 6462m 3.5g 3.5g S 0.0 3.7 0:13.13 postgres:
> writer process
> 10988 pg91 15 0 6475m 1.7g 1.7g S 0.0 1.9 0:40.74 postgres:
> integracao senai 10.1.3.200(57290) idle
> 18518 pg91 18 0 6475m 1.7g 1.7g S 0.0 1.9 0:36.38 postgres:
> integracao senai 10.1.3.200(51766) idle
> 23965 pg91 25 0 6528m 1.3g 1.2g S 0.0 1.3 1:09.19 postgres:
> sgn2 senai 10.1.3.1(8353) idle
> 30504 pg91 15 0 6700m 1.2g 1.0g S 0.0 1.3 0:17.64 postgres:
> sgn2 senai 10.1.3.1(20575) idle
> 1399 pg91 17 0 6515m 1.2g 1.2g S 0.0 1.3 0:56.62 postgres:
> sgn2 senai 10.1.3.1(52594) idle
> 5732 pg91 15 0 6521m 1.1g 1.1g S 0.0 1.2 0:33.35 postgres:
> sgn2 senai 10.1.3.1(57789) idle
> 8223 pg91 15 0 6520m 1.1g 1.1g S 0.0 1.2 0:22.02 postgres:
> sgn2 senai 10.1.3.1(39002) idle
> 7244 pg91 16 0 6527m 1.1g 1.0g R 6.1 1.2 0:14.65 postgres:
> sgn2 senai 10.1.3.1(58921) SELECT
> 7916 pg91 15 0 6527m 1.1g 1.0g S 0.0 1.1 0:32.47 postgres:
> sgn2 senai 10.1.3.1(38869) idle
> 29701 pg91 15 0 6517m 1.0g 1.0g S 0.0 1.1 0:08.02 postgres:
> sgn2 senai 10.1.3.1(47910) idle
> 17445 pg91 17 0 6519m 1.0g 1.0g S 0.0 1.1 0:06.75 postgres:
> sgn2 senai 10.1.3.1(10035) idle
> 1398 pg91 17 0 6513m 1.0g 951m S 0.0 1.0 1:46.55 postgres:
> sgn2 senai 10.1.3.1(26616) idle
> 30155 pg91 15 0 6496m 825m 792m S 0.0 0.9 0:16.80 postgres:
> sgn2 senai 10.1.3.1(20472) idle
> 8225 pg91 15 0 6511m 743m 696m S 0.0 0.8 0:17.39 postgres:
> sgn2 senai 10.1.3.1(59397) idle
> 30156 pg91 15 0 6492m 712m 683m S 0.0 0.7 0:18.27 postgres:
> sgn2 senai 10.1.3.1(48402) idle
> 29471 pg91 15 0 6514m 559m 508m S 0.0 0.6 0:11.30 postgres:
> sgn2 senai 10.1.3.1(47784) idle
> 8314 pg91 15 0 6695m 447m 225m S 0.0 0.5 0:14.44 postgres:
> sgn2 senai 10.1.3.1(59469) idle
> 13807 pg91 15 0 6492m 399m 369m S 0.0 0.4 2:00.32 postgres:
> sgn2 senai 10.1.3.1(31021) idle
> 18621 pg91 17 0 6554m 370m 294m R 44.4 0.4 0:01.17 postgres:
> sgn2 senai 10.1.3.1(61676) SELECT
> 15904 pg91 17 0 6507m 316m 273m R 66.4 0.3 0:04.10 postgres:
> sgn2 senai 10.1.3.1(7043) SELECT
> 28055 pg91 18 0 6493m 236m 203m S 0.0 0.2 0:02.72 postgres:
> sgn2 senai 10.1.3.1(14902) idle
> 8313 pg91 15 0 6684m 228m 85m S 0.0 0.2 0:00.59 postgres:
> sgn2 senai 10.1.3.1(59466) idle
> 30503 pg91 15 0 6682m 212m 71m S 0.0 0.2 0:00.43 postgres:
> sgn2 senai 10.1.3.1(48499) idle
>
> --
> Daniel Cristian Cruz
> クルズ クリスチアン ダニエル

--
Adrian Klaver
adrian(dot)klaver(at)gmail(dot)com