Date: Mon, 8 Mar 2004 00:13:39 -0700 From: "T. Halter" <tom@vsn1.com> To: <des@des.no> Cc: questions@freebsd.org Subject: Emailing: 019150.htm Message-ID: <000501c404dc$e1a37a40$0407a8c0@mustang>
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'kern.maxpipekva exceeded' messages...Dag & everyone, I'm running into the same problem. I understand that this can be = fixed by putting a variable in the /boot/loader.conf file. I've ready = the man pages for loader and loader.conf and I do not understand what = variable to include or what format to put it in. Could someone please give me a hand here and either explain what to do = or where I can find some helpful text to fix this? Thanks! T. Halter SysAd VSN1 'kern.maxpipekva exceeded' messages... Dag-ErlingSm=F8rgrav des at des.no=20 Tue Jan 20 00:57:24 PST 2004=20 a.. Previous message: 'kern.maxpipekva exceeded' messages...=20 b.. Next message: i865 Video Memory=20 c.. Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]=20 -------------------------------------------------------------------------= ------- Peter Losher <Peter_Losher at isc.org> writes: > In updating one of our authoritiative name servers to 5.2-REL, we = enountered=20 > after two days of running, kernel message like: > > kern.maxpipekva exceeded, please see tuning(7). > > appearing to the point to where you couldn't ssh into the box (because = sshd=20 > died w/ too many files opened). I see so mention of kern.maxpipekva = on the=20 > tuning man page, and greping only finds kern.ipc entries. > > % sysctl -a | grep pipekva > kern.ipc.maxpipekva: 10485760 > kern.ipc.maxpipekvawired: 5242880 > kern.ipc.pipekva: 131072 > kern.ipc.pipekvawired: 0 > > Are they the same, and if so, what's are the guidelines for increasing = the=20 > number? yes, the error message is incorrect. here's an excerpt from comment in the kernel sources: * In order to limit the resource use of pipes, two sysctls exist: * * kern.ipc.maxpipekva - This is a hard limit on the amount of pageable * address space available to us in pipe_map. Whenever the amount in = use * exceeds half of this value, all new pipes will be created with size * SMALL_PIPE_SIZE, rather than PIPE_SIZE. Big pipe creation will be = limited * as well. This value is loader tunable only. * * kern.ipc.maxpipekvawired - This value limits the amount of memory = that may * be wired in order to facilitate direct copies using page flipping. * Whenever this value is exceeded, pipes will fall back to using = regular * copies. This value is sysctl controllable at all times. * * These values are autotuned in subr_param.c. * * Memory usage may be monitored through the sysctls * kern.ipc.pipes, kern.ipc.pipekva and kern.ipc.pipekvawired. You can set these variables in /boot/loader.conf. DES --=20 Dag-Erling Sm=F8rgrav - des at des.no -------------------------------------------------------------------------= ------- a.. Previous message: 'kern.maxpipekva exceeded' messages...=20 b.. Next message: i865 Video Memory=20 c.. Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]=20 -------------------------------------------------------------------------= ------- More information about the freebsd-current mailing list
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