Date: Wed, 26 Jun 2002 09:53:26 -0700 From: Alfred Perlstein <bright@mu.org> To: Patrick Thomas <root@utility.clubscholarship.com> Cc: Terry Lambert <tlambert2@mindspring.com>, Peter Wemm <peter@wemm.org>, freebsd-hackers@FreeBSD.ORG Subject: Re: tunings for many httpds... Message-ID: <20020626165326.GC18877@elvis.mu.org> In-Reply-To: <20020625225929.U68572-100000@utility.clubscholarship.com> References: <3D190FFA.C7AE70BF@mindspring.com> <20020625225929.U68572-100000@utility.clubscholarship.com>
next in thread | previous in thread | raw e-mail | index | archive | help
* Patrick Thomas <root@utility.clubscholarship.com> [020625 23:06] wrote: > > > > Uhh, Terry, neither form of SHM uses KVA. Either pageable or physically > > > backed. The memory is only mapped into processes and is NOT mapped into > > > KVA anywhere. (*) > > > > You and Alfred are right. > > > > It looks like this was corrected by John Dyson, shortly after he > > had checked it in to work that way. > > So the conclusion is that: > > sysctl kern.ipc.shm_use_phys=1 > > Is not even potentially a magic bullet for the issue I am seeing (since > either way, all those greatly increased SHM/SEM settings I added are not > using KVA) ?? Without kern.ipc.shm_use_phys=1 you will use more KVA, however do realize that with it the shared memory is non-pageable, meaning it can not be swapped out if something else needs the RAM. -- -Alfred Perlstein [alfred@freebsd.org] 'Instead of asking why a piece of software is using "1970s technology," start asking why software is ignoring 30 years of accumulated wisdom.' Tax deductible donations for FreeBSD: http://www.freebsdfoundation.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020626165326.GC18877>