(2013/08/05 21:23), Tom Lane wrote: > Andres Freund <andres@xxxxxxxxxxxxxxx> writes: >> ... Also, there are global >> limits to the amount of filehandles that can simultaneously opened on a >> system. > > Yeah. Raising max_files_per_process puts you at serious risk that > everything else on the box will start falling over for lack of available > FD slots. Is it Really? When I use hadoop like NOSQL storage, I set large number of FD. Actually, Hadoop Wiki is writing following. http://wiki.apache.org/hadoop/TooManyOpenFiles > Too Many Open Files > > You can see this on Linux machines in client-side applications, server code or even in test runs. > It is caused by per-process limits on the number of files that a single user/process can have open, which was introduced in the 2.6.27 kernel. The default value, 128, was chosen because "that should be enough". > > In Hadoop, it isn't. ~ > ulimit -n 8192 Regards, -- Mitsumasa KONDO NTT Open Source Software Center -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
