Date: Sat, 21 Mar 2015 23:24:16 +0200 From: Konstantin Belousov <kostikbel@gmail.com> To: Dmitry Morozovsky <marck@rinet.ru> Cc: svn-src-head@freebsd.org, Mark Linimon <linimon@lonesome.com>, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r280323 - head/sys/kern Message-ID: <20150321212416.GU2379@kib.kiev.ua> In-Reply-To: <alpine.BSF.2.00.1503220014150.60253@woozle.rinet.ru> References: <201503211501.t2LF1Kj8052521@svn.freebsd.org> <20150321210341.GC15857@lonesome.com> <20150321210810.GT2379@kib.kiev.ua> <alpine.BSF.2.00.1503220014150.60253@woozle.rinet.ru>
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On Sun, Mar 22, 2015 at 12:16:22AM +0300, Dmitry Morozovsky wrote: > On Sat, 21 Mar 2015, Konstantin Belousov wrote: > > > > > Somewhat modernize the SysV shm code: > > > > > > Interesting. > > > > > > 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.
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