Hi,
we installed a fresh kernel 2.4 system (SuSe 8.1) on our production system and now for the first time had one of those crashes I have been reporting in recent weeks again (lots of failed mallocs in knldiag and finally it crashes). could someone please take a look at the kernel parameters we're using? I cannot imagine that it's running out of physical memory as the machine has 2GB RAM and a rather small database (<1GB) and not much load (never more than 50 concurrent connections). we at first suspected faulty RAM modules and exchanged them but that made no difference. our kernel.sem parameter looks a lot different from the one posted by Markus (see part of quoted email below). As I don't understand the exact meaning of the params (embarrassing but true) I don't want to fiddle around with them without some advice or a pointer to some documentation. please take a guess whether we have the kernel setup wrong or there is something else we should look for. please let me know if I should post any other parameters or provide any more info. this instability is really killing us. the knldiag, knldiag.err and rtedump for the crash can be downloaded at http://www.signal7.de/sapdbcrash101502.tgz here are the kernel parameters. kernel.overflowgid = 65534 kernel.overflowuid = 65534 kernel.random.uuid = d14e035f-e04b-481c-b40b-25279634a6d3 kernel.random.boot_id = d66d8411-1fb0-4444-91e3-8dd7e8d29d60 kernel.random.write_wakeup_threshold = 128 kernel.random.read_wakeup_threshold = 8 kernel.random.entropy_avail = 4096 kernel.random.poolsize = 512 kernel.threads-max = 14336 kernel.cad_pid = 1 kernel.sem = 250 256000 32 1024 kernel.msgmnb = 16384 kernel.msgmni = 128 kernel.msgmax = 8192 kernel.shmmni = 4096 kernel.shmall = 1073741824 kernel.shmmax = 1073741824 kernel.shm-use-bigpages = 0 kernel.rtsig-max = 1024 kernel.rtsig-nr = 0 kernel.acct = 4 2 30 kernel.modprobe = /sbin/modprobe kernel.printk = 1 4 1 7 kernel.ctrl-alt-del = 0 kernel.real-root-dev = 2049 kernel.cap-bound = -257 kernel.tainted = 0 kernel.core_uses_pid = 0 kernel.panic = 0 kernel.domainname = kernel.hostname = ha1 kernel.version = #3 SMP Wed Oct 9 15:50:46 CEST 2002 kernel.osrelease = 2.4.19-4GB-SMP kernel.ostype = Linux fs.file-max = 209713 fs.file-nr = 1724 Thanks in advance, Robert > > > > This is our settings in /etc/sysctl.conf on a machine with 4 Gig of RAM: > > > > [root@aubir3p1 /root]# grep -v \# /etc/sysctl.conf > > net.ipv4.ip_forward = 0 > > net.ipv4.conf.all.rp_filter = 1 > > net.ipv4.ip_always_defrag = 0 > > kernel.sysrq = 0 > > fs.file-max=32768 > > > > kernel.shmmax=3221225472 > > kernel.sem=4096 512000 1600 2048 > > kernel.msgmax=16384 > > kernel.shmall=3221225472 > > > > This applies to Kernel 2.4 of course :-) > > > > > > Hope this helps. > > > > Greetings, _______________________________________________ sapdb.general mailing list [EMAIL PROTECTED] http://listserv.sap.com/mailman/listinfo/sapdb.general
