On Sat, 21 Mar 2015, Konstantin Belousov wrote: > > > > > Somewhat modernize the SysV shm code: > > > > > > > > Is my understanding correct that postgres still uses shm? If so, > > > > has someone benchmarked the speedup? > > > > > > Yes, some versions of Postgres still use SysV shm. > > > > To be clarified: IIUC, *all* contemporary versions of PostgreSQL do > > use SHM for shatrd buffers (as PgSQL use process-per-connection model) > > No. Recent versions use mmaped shared region for buffers.
Yes, starting from 9.3 main buffers are memory-mapped. SysV SHM and Semaphores *are* still in use though. (mainly for search engines) Thanks for the clarification. -- Sincerely, D.Marck [DM5020, MCK-RIPE, DM3-RIPN] [ FreeBSD committer: ma...@freebsd.org ] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- ma...@rinet.ru *** ------------------------------------------------------------------------ _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
