Date: Wed, 31 Jan 1996 15:13:07 -0700 From: Nate Williams <nate@sri.MT.net> To: Jake Hamby <jehamby@lightside.com> Cc: freebsd-hackers@FreeBSD.org Subject: Swapping (was Re: Good news -- pipe stuff) Message-ID: <199601312213.PAA17374@rocky.sri.MT.net> In-Reply-To: <Pine.AUX.3.91.960131102030.15314A-100000@covina.lightside.com> References: <peter.823081637@jhome.DIALix.COM> <Pine.AUX.3.91.960131102030.15314A-100000@covina.lightside.com>
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> > Another thing to look into, although I don't have a benchmark on this, but > FreeBSD has a nasty tendency to "bind" during heavy VM/disk activity. I > don't know if this is because the IDE driver is CPU intensive, or if this > affects people (to a lesser extent) with SCSI drives. This is an IDE thing. Basically, the system must uses lots more CPU and is much less effecient than using the SCSI drivers. > It's just that when > the system starts paging out to disk, activity in other windows freezes up > too. There's nothing else the system can do when it's swapping. :) > Speaking of VM, I set up a system with only 8MB of RAM running FreeBSD, > and even though we made a 24MB swap partition, occasionally it fills up. > Both boxes are running 2.1.0-RELEASE. If it is not too difficult, I > would be REALLY grateful if we could add functionality to add swapfiles > and swap partitions to a running system. You can. See 'man vnconfig'. > Even better would be the > ability to remove the swapfile without rebooting. Linux (and most > SVR4's) have had this functionality for a LONG time. Are you *SURE* you can remove it w/out rebooting on Linux. AFAIK, it's not possible, although I do know my Solaris box can delete swapfiles (although I have yet to have an occasion to do so, since the Solaris box always wants more swap than I have disk space. :) Nate
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