Date: Wed, 26 Jun 2002 00:19:06 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: Patrick Thomas <root@utility.clubscholarship.com> Cc: Peter Wemm <peter@wemm.org>, Alfred Perlstein <bright@mu.org>, freebsd-hackers@FreeBSD.ORG Subject: Re: tunings for many httpds... Message-ID: <3D196AEA.3229476@mindspring.com> References: <20020625225929.U68572-100000@utility.clubscholarship.com>
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Patrick Thomas 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) ?? It will save some KVA, especially after forks, as Peter pointed out. But it's unlikely at this point, given the off-list issues, that your problem is KVA space, particularly since it's happening at the same time very day. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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