site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type:content-transfer-encoding; bh=9dQ5c/VxQZRaW5oRAhANDiiMI7oOud7vsNcxSMU4c+Q=; b=CAQR+QPF+kQNwXbjklp0jrr2auUkywQ1Qi1cEjnbKUu9pyXa5oGOQ1/ldtofyOkszo 6n3vnJSwFKAzfWhlgk90SaWRpj9nwAvq7HbeMsBL39iSVd8c7WZdtljbD6y6kYVkwgxF eGesz8ug5EATu0OOyRM5gX5t7RoEZPgd/DN4U= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type :content-transfer-encoding; b=pSdt6rvcnEMdHm0XUIfw64Calf8gtR1K0bUaXAOXfygRPO6iRc1wSTqfbIZx1pFHLF wd+9hxMmJp3g3gEVKPe5Jz4iXLIis49pm7eat+Ud2QNpHnyvf+LcCOAmgi9cEwF8nc7h h6hIuRFpLIjy9c1DIBIOtGZ64NyCO0DXk3vi0= I've been posting about this to macos-x-server and unix-porting for a few days before it dawned on me that there was probably a kernel mailing list. So...Hi! My name's Nathan and this is my first post. ---- After a frustrating and long search for the root of the various problems I was having with my new Xserve serving email via IMAP, I was tipped off by... http://support.apple.com/kb/TS1659 ...that the kernel has insanely low defaults (for a server) for kern.maxproc (532), which controls the maximum amount of processes allowed to run on the system. While trying to raise the default to a reasonable value (Linux defaults to 32,768 for example), I discovered that I couldn't raise it above 2500. Peter O'Gorman tells me off that this is a hard-coded limit in Xnu: ./bsd/conf/param.c:#define HNPROC 2500 /* based on thread_max */ I've already filed rdar://6536876 asking that this be raised, but as I've had very poor returns with my filed bugs that I spent a long time researching, and very good returns on Apple mailing lists (go apple-x11!), I thought I'd post here too. :-) Is there any reason the hard limit couldn't be raised an order of magnitude or two? Even with raising kern.maxproc (and kern.maxprocperuid and the launchd settings that mirror it and launchd's maxfiles setting, etc. etc) my Xserve will run into the process limit far before it exhausts CPU, RAM, disk, or bandwidth resources. I'd be happy to provide some legwork (testing, doing some sanity checks on stuff in the kernel source code, etc.) if that would help. I am a registered ADC member and I'm willing to get my hands dirty to get this fixed. I've set up four-dozen OS X stations up in my company, as well as 200 linux stations, all of which access our Xserve for mail. It was very embarassing when we switched from our email hosting provider (who used OpenBSD) to our own Apple Xserve (I didn't want to have to learn to configure courier+cyrus+postfix+whatever all by myself on a Linux server) that we had so many problems for so long and it took two months to narrow it down to an apparently arbitrarily small value for kern.maxproc (and launchd). ~ Nathan _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... This email sent to site_archiver@lists.apple.com