On Wed, 4 Jun 2008 at 18:46 -0500, [EMAIL PROTECTED] confabulated:
I just noticed today I'm starting to get messages in ../messages stating: Approaching the limit on PV entries, consider increasing either the vm.pmap.shpgperproc or the vm.pmap.pv_entry_max sysctl. I did some searching and don't really know what is going on. I did a search using sysctl for all pmap knobs and this is what they are currently: vm.pmap.pmap_collect_active: 0 vm.pmap.pmap_collect_inactive: 0 vm.pmap.pv_entry_spare: 51310 vm.pmap.pv_entry_allocs: 67575721858 vm.pmap.pv_entry_frees: 67574088800 vm.pmap.pc_chunk_tryfail: 0 vm.pmap.pc_chunk_frees: 416252902 vm.pmap.pc_chunk_allocs: 416262928 vm.pmap.pc_chunk_count: 10026 vm.pmap.pv_entry_count: 1633059 vm.pmap.shpgperproc: 500 vm.pmap.pv_entry_max: 6125408 I did increased vm.pmap.shpgperproc to 500 from 200 and immediately saw vm.pmap.pv_entry_max increase as well. This server is a Dell PowerEdge 6850 with four 3.0Gz dual core Zeon processors and 12Gb ram. The server's only purpose is a spam filter. It is running SpamAssassin, ClamAV, Postfix and MySQL. The server is pretty memory intensive. Active memory usually doesn't drop below 8Gb. SpamAssassin usually has roughly 24 children running all the time consuming ~120Mb per child. MySQL is currently taking ~5.5Gb. Can someone shed light on what is going on or what needs to be tweaked?pv_entry are entries that are used to keep track of which processes are sharing a physical page. pv_entry are allocated in groups (chunks to fill a page) - 168 for the AMD64. The more RAM and processes that you have, the more probably that the pages are shared in multiple processes and more pv_entrys are needed. It looks like you are well below the pv_entry_max with shpgperproc at 500.
I figured out what was going on when the messages hit the ../messages log. I have a cronjob that executes a MySQL script to optimize tables. It was during that time when the syslog messages were logged. Since increasing vm.pmap.shpgperproc yesterday, I haven't seen anything in the logs.
Thanks for the response. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"
