On Saturday, 07.04.2007 at 14:02 -0400, Greg Folkert wrote: > On Sat, 2007-04-07 at 18:53 +0100, Dave Ewart wrote: > > On Saturday, 07.04.2007 at 12:08 -0400, Greg Folkert wrote: > > > > > On Sat, 2007-04-07 at 16:06 +0100, Dave Ewart wrote: > > > > On Friday, 06.04.2007 at 15:39 -0700, Francesco Pietra wrote: > > > > > > > > > 1) How to set shmmax in debian? > > > > > > > > For the running kernel, echo a value to /proc/sys/kernel/shmmax > > > > - to make it a permanent setting (i.e. set automatically at > > > > subsequent reboots), include the setting in /etc/sysctl.conf: > > > > > > > > kernel.shmmax=whatever > > > > > > Umm, shmmax is auto-adjusted now in the 2.6 kernel. This is not > > > the real reason he is having difficulty. > > > > Hmm, since which kernel version, out of interest? > > > > The reason I ask is that I found it necessary to set SHMMAX for an > > AMD64 Sarge machine with 16GB RAM running as a PostgreSQL database > > server and improved performance significantly as a result. For > > compatability reasons with the hardware, I couldn't use the most > > recent kernel: it's running 2.6.12. > > See my other reply to Francesco, I went through the Kernel Docs and > the code... discovered it is auto-set at boot, but changeable. There > was some serious work being dome on these parameters being > auto-adjusting, but I see that it is not in any of the VM or semaphore > controls, using the defaults engines. I don't really understand your answer here, but anyway ... I wasn't the one reporting the original problem ;-) As I can say is that I found that setting SHMMAX worked for me, for a particular purpose. I'm happy to accept that it may not be appropriate here. Dave. -- Please don't CC me on list messages! ... Dave Ewart - davee@sungate.co.uk - jabber: davee@jabber.org All email from me is now digitally signed, key from http://www.sungate.co.uk/ Fingerprint: AEC5 9360 0A35 7F66 66E9 82E4 9E10 6769 CD28 DA92
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