(scrap my previous internal email (hence fake) address this one is correct : sorry for that) You can stop pgsql, start it and then watch out for the increase in SEGSZ values. I pretty much think they are in bytes. I am pretty confident that this value depicts the shared_buffers size in bytes. On Δευ 05 Νοε 2012 13:14:37 Achilleas Mantzios wrote: > > ipcs in FreeBSD is a little ... tricky. > > ipcs -M > ipcs -m > ipcs -am > > could be your friends > > On Δευ 05 Νοε 2012 11:22:46 Frank Broniewski wrote: > > Hi, > > > > I am running a PostgreSQL server on FreeBSD. The system has 32GB memory. > > Usually I use top to examine the memory usage of the system. After a > > while, a part, approximately 5GB, vanish from top, so that the memory > > rounds up to 27GB. After restarting PostgreSQL, I have all 32GB again > > available, but then it's already slightly decreasing. It's a standalone > > database server. It has an OpenStreetMap world database running with > > 353GB data (with indices). > > > > Some system information: > > # uname -r > > 9.0-RELEASE-p3 > > # pg_ctl --version > > pg_ctl (PostgreSQL) 9.1.6 > > > > # cat /boot/loader.conf > > ... > > kern.ipc.semmni=256 > > kern.ipc.semmns=512 > > kern.ipc.semmnu=256 > > kern.ipc.semumr=200 > > vm.pmap.shpgperproc=400 > > vm.pmap.pv_entry_max=50331648 > > ... > > > > # cat /pgdata/data/postgresql.conf > > ... > > default_statistics_target = 50 # pgtune wizard 2012-04-04 > > maintenance_work_mem = 4GB # pgtune wizard 2012-04-04 > > constraint_exclusion = on # pgtune wizard 2012-04-04 > > checkpoint_completion_target = 0.9 # pgtune wizard 2012-04-04 > > effective_cache_size = 24GB # pgtune wizard 2012-04-04 > > work_mem = 768MB # pgtune wizard 2012-04-04 > > wal_buffers = 16MB # pgtune wizard 2012-04-04 > > checkpoint_segments = 60 # 20 > > shared_buffers = 8GB # pgtune wizard 2012-04-04 > > max_connections = 100 > > synchronous_commit = off > > > > > > So any help finding out why my system "looses" some RAM is greatly > > appreciated :-) If more information is needed I will gladly provide it. > > > > Frank > > > > > > > > > - > Achilleas Mantzios > IT DEPT > > > - Achilleas Mantzios IT DEPT -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
