Hello All I want to get to the bottom of a warning in dmesg. On 7.2-RELEASE and 7.3-RELEASE I have seen the following warning in dmesg.
Approaching the limit on PV entries, consider increasing either the vm.pmap.shpgperproc or the vm.pmap.pv_entry_max sysctl. So looking around I see a few posts here and there about how to tune the sysctls to address the warning however I am not 100% sure what each value does. It appears changing vm.pmap.shpgperproc affects the value of vm.pmap.pv_entry_max . Can someone explain the relationship of the two sysctls. Also what pitfalls of changing them are. Also why would setting kern.ipc.shm_use_phys=1 effect the pv entries. Is this supposed to lower the pv entries ? Some details on the systems where I saw this. FreeBSD 7.3-RELEASE-p5 amd64 2G RAM + 2G SWAP 1 single core opteron Superpages are enabled The servers are high traffic web-servers serving static content. tunings kern.ipc.maxsockbuf=2097152 kern.ipc.nmbclusters=32768 kern.ipc.somaxconn=1024 kern.maxfiles=131072 kern.maxfilesperproc=32768 net.inet.tcp.inflight.enable=0 net.inet.tcp.path_mtu_discovery=0 net.inet.tcp.recvbuf_max=2097152 net.inet.tcp.sendbuf_max=2097152 net.isr.direct=1 vm.pmap.shpgperproc=600 vfs.read_max=64 http://lists.freebsd.org/pipermail/freebsd-hackers/2009-December/030193.html http://lists.freebsd.org/pipermail/freebsd-hackers/2009-July/029076.html http://forums.freebsd.org/showthread.php?t=17786 -- mark saad | nones...@longcount.org _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
