Date: Tue, 17 Jan 2006 22:26:05 -0500 From: Kris Kennaway <kris@obsecurity.org> To: Michael Barnett <mbarnett@measuremap.com> Cc: freebsd-questions@freebsd.org Subject: Re: PAE causing system crashes Message-ID: <20060118032604.GA97030@xor.obsecurity.org> In-Reply-To: <0F01FAC2-09A7-47EC-AB05-B75564FC2433@measuremap.com> References: <47A794C0-FE22-46FC-9D81-BCF3359CBD61@measuremap.com> <20060118010418.GA95598@xor.obsecurity.org> <0F01FAC2-09A7-47EC-AB05-B75564FC2433@measuremap.com>
index | next in thread | previous in thread | raw e-mail
[-- Attachment #1 --] On Tue, Jan 17, 2006 at 08:38:08PM -0600, Michael Barnett wrote: > It ran fine when we were only throwing a few dozen qps at it... when > we tried to throw about 350qps its way, it was much much slower... > slower than our existing server with significantly fewer resources > available. > > I never could figure out what the issue was... tried recompiling with > different options, allocating more and less memory to mysql (really > to innodb as all our tables are innodb), and a number of system > tweaks to no avail. > > Are you running it on an opteron, or on a xeon? I have heard things > go much smoother on AMD hardware. I've used it for mysql benchmarking (using supersmack) on amd hardware and got quite good performance from it. I've not used it with a 'real' database on that machine. > Anyways.. the damage is done. We are back on i386 and I just need to > make it go! Right now i am just running with the stable non-PAE > kernel that limits access to 4G of memory while i work this out. It could be a driver issue, although since you're not adding drivers to the PAE config I don't know why this would be. Still, you could post your dmesg so that someone might be able to recognize a problem. Try looking for an updated BIOS. It could be that your HW has a buggy implementation. Kris [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDzbVMWry0BWjoQKURAqioAJ45gI8QyE/SVImVVCFky36NTCN4ugCbBrmG kGmAfb732LVB6vMdK7TQXZU= =3kcb -----END PGP SIGNATURE-----help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20060118032604.GA97030>