* Gregory Stark: > You might also tweak /proc/sys/vm/overcommit_memory but I don't remember what > the values are, you can search to find them. "2" is the interesting value, it turns off overcommit. However, if you're tight on memory, this will only increase your problems because the system fails sooner. The main difference is that it's much more deterministic: malloc fails in a predictable manner and this situation can be handled gracefully (at least by some processes); no processes are killed. We use this setting on all of our database server, just in case someone performs a huge SELECT locally, resulting in a a client process sucking up all available memory. With vm.overcommit_memory=2, memory allocation in the client process will fail. Without it, typically the postgres process feeding it is killed by the kernel. -- Florian Weimer <fweimer@xxxxxx> BFK edv-consulting GmbH http://www.bfk.de/ Kriegsstraße 100 tel: +49-721-96201-1 D-76133 Karlsruhe fax: +49-721-96201-99 ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
