Date: Wed, 18 Aug 1999 11:43:53 -0700 (PDT) From: Mike Harshbarger <mharsh@fsr.net> To: freebsd-isp@freebsd.org Subject: Re: pwd_mkdb and system processes Message-ID: <Pine.BSF.3.96.990818113022.7774f-100000@archer.fsr.net> In-Reply-To: <199908131746.MAA21122@troi.csw.net>
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Wow! What a change... 12K accounts and the pwd_mkdb run time dropped from 140 seconds down to 16 seconds. 6 Meg cache seemed optimal for me. Also, I've always been disappointed at the speed of the 'pw' command... especially with all the 'pw usermod's I get to do daily. It seems like it took 5 minutes. 'pw' seems to have sped up similarly with this change. On a related note, is there any chance in the future of the 'pw' command supporting a command line option like pwd_mkdb's '-u' so it doesn't have to reconstruct entire password databases? ___ ___ ___ | __/ __|_ _| Mike Harshbarger, First Step Internet | _|\__ \| | System & Network Administrator |_| |___/___| (208) 882-8869 / 1-888-676-6377 On Fri, 13 Aug 1999 lambert@cswnet.com wrote: > That did it. It went from 4:40 seconds to 20 seconds. I just gave it a > cache size of 10 MB on the command line args. I could probably tune it > down from there but I'm not into swap on this box anyway so it isn't > hurting me and as my userbase grows it will handle the load. > > Thanks, > > In <Pine.BSF.4.05.9908131247350.11175-100000@buffnet11.buffnet.net>, on > 08/13/99 > at 12:47 PM, Steve Hovey <shovey@buffnet.net> said: > > >Or just increase the cache size it uses to it gets done quicker > > >On Fri, 13 Aug 1999, Joe Nall wrote: > > >> lambert@cswnet.com wrote: > >> > > >> > I've been trying to track down a problem on my e-mail server where it > >> > stops processing smtp and pop processes for 5 minutes at a time. > >> > > >> > # wc -l /etc/passwd > >> > 14945 /etc/passwd > >> > > >> > We rebuild this file once per hour to add or remove customers. > >> > > >> > I finally caught it with a top session running at the time. > >> > > >> > Inetd was accepting new connections and starting popper but people can't > >> > authenticate. > >> > Sendmail accepts new connections but they stall until pwd_mkdb goes away. > >> > When I try to run a command from the command line, it doesn't execute > >> > until pwd_mkdb gets done. > >> > The CPU is 97% idle during this time. > >> > > >> > Does all file access in the system stop while pwd_mkdb runs? > >> No but all password lookups do. Both of theses commands rely on the > >> file you are rebuilding and the files involved are locked during the > >> process. You might try pwd_mkdp -d /tmp <> followed by a mv of the > >> relevant files into /etc or try pwd_mkdb -u <user> at the time the > >> passwd file gets modified and avoid the overhead of the total rebuild. > >> YMMV, I haven't used the -d option. > >> Joe > >> > >> > >> To Unsubscribe: send mail to majordomo@FreeBSD.org > >> with "unsubscribe freebsd-isp" in the body of the message > >> > > > > -- > Scott Lambert > lambert@cswnet.com > Systems and Security Administrator > CSW Net, Inc. > ================================================================ > Written: Friday, August 13, 1999 - 12:40 PM > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-isp" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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