Hello Andreas, Am 15.12.2011 18:40, schrieb lst_hoe02@xxxxxxxxx: > Zitat von Jan-Peter.Seifert@xxxxxx: >> -------- Original-Nachricht -------- >>> Datum: Thu, 08 Dec 2011 13:04:30 +0100 >>> Von: lst_hoe02@xxxxxxxxx >>> Zitat von Jan-Peter Seifert <Jan-Peter.Seifert@xxxxxx>: >> >>> > I wonder whether the number of connections is still limited on >>> > Windows 64-bit if you also use a 64-bit version of PostgreSQL: >> >>> http://wiki.postgresql.org/wiki/Running_%26_Installing_PostgreSQL_On_Native_Windows#I_cannot_run_with_more_than_about_125_connections_at_once.2C_despite_having_capable_hardware >>> >> >>> http://support.microsoft.com/kb/947246/en-us >> >> So the default setting for Windows 7 64-Bit seems to be: >> SharedSection=1024,20480,768 >> >> Makes me wonder whether PostgreSQL ( as a service ) still uses the >> 'Non-interactive desktop heap' for connections then. > > As far as i understand not PostgreSQL is using the heap but the system > component user32.dll does. Not sure why user32.dll is needed but i > remember Oracle at least back in 9.x days had the very same problem. > >> I used pgbench for testing 500 connections ( max_connections set to >> 600 ): >> Initialize: >> pgbench -i -U postgres -h host -p port >> Test: >> pgbench -U postgres -h host -p port -c 500 >> Verify: >> SELECT COUNT(*) FROM pg_stat_activity; >> >> The non-interactive Desktop Heap has been increased by just a half - >> yet the number of connections can obviously be much higher than 200. I >> guess the connections don't need less memory now though. > > I think i have read somewhere that MS has optimized the Desktop Heap > usage in Vista and later, but not sure where it was. I guess you mean this blog post: http://blogs.msdn.com/b/ntdebugging/archive/2008/03/20/the-default-interactive-desktop-heap-size-has-been-increased-on-32-bit-vista-sp1.aspx This seems to be an interesting post, too: http://thundaxsoftware.blogspot.com/2011/10/monitoring-desktop-heap-memory-and_17.html >> Do the services share the same desktop (heap) or does each >> (PostgreSQL) service has its own ( if I register each service for a >> different Windows user?). > > To be honest i don't know at all... I'll have a look then. Thank you very much for your comments, Peter -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
