Date: Thu, 05 Jun 2008 16:00:13 +0200 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-hackers@freebsd.org Subject: Re: Is there any way to increase the KVM? Message-ID: <g28rhe$32m$1@ger.gmane.org> In-Reply-To: <20080605062728.GA4278@garage.freebsd.pl> References: <6a7033710805302252v43a7b240x66ca3f5e3dd5fda4@mail.gmail.com> <20080603135308.GC3434@garage.freebsd.pl> <6a7033710806032317g4dbe8845h26a1196016b9c440@mail.gmail.com> <86zlq140x0.fsf@ds4.des.no> <6a7033710806041053g4a5c2fdftd7202b708bff363c@mail.gmail.com> <20080605062728.GA4278@garage.freebsd.pl>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigD68D107016C060E9C72D20D4 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Pawel Jakub Dawidek wrote: > If we're comparing who has bigger... :) >=20 > beast:root:~# zpool list > NAME SIZE USED AVAIL CAP HEALTH ALTROOT= > tank 732G 604G 128G 82% ONLINE - >=20 > but: >=20 > beast:root:~# zfs list | wc -l > 1932 >=20 > No panics. >=20 > PS. I'm quite sure the ZFS version I've in perforce will fix most if no= t > all 'kmem_map too small' panics. It's not yet committed, but I do want > to MFC it into RELENG_7. At the risk of sounding repetitive, can you try a simple test on your ZFS pools, to see if you can panic the kernel? Do this: * install blogbench and bonnie++ from ports/benchmarks * run: blogbench -c 100 -d . -i 30 -r 50 -W 10 -w 10 bonnie++ -d . -s 16G -n 80 in parallel, until completion or crash. It shouldn't take too long to complete the above benchmarks, so you probably won't invest too much time in it even if it doesn't crash. (note: in the above command lines, "." is the current working directory, which is on ZFS, and "16G" is "2*RAM size". Keep the "-s" argument high even if you don't have lots of RAM.) This assumes you have a multi-core machine on which ZFS is running. 4 would be nice, 2 is probably ok. --------------enigD68D107016C060E9C72D20D4 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFIR/FtldnAQVacBcgRAimIAKDGj6oI2veyw/rznL+1lM3uY+d/tACfcSli FP09jC4k0ttb/r38OuAakLg= =RMij -----END PGP SIGNATURE----- --------------enigD68D107016C060E9C72D20D4--
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