Mike Gerdts wrote > By default, only kernel memory is dumped to the dump device. Further, > this is compressed. I have heard that 3x compression is common and > the samples that I have range from 3.51x - 6.97x.
My samples are in the range 1.95x - 3.66x. And yes, I lost a few crash dumps on a box with a 2GB swap slice, after physical memory was upgraded from 4GB to 8GB. % grep "pages dumped" /var/adm/messages* /var/adm/messages:Jun 27 13:43:56 tiger2 genunix: [ID 409368 kern.notice] ^M100% done: 593680 pages dumped, compression ratio 3.51, /var/adm/messages.0:Jun 25 13:08:22 tiger2 genunix: [ID 409368 kern.notice] ^M100% done: 234922 pages dumped, compression ratio 2.39, /var/adm/messages.1:Jun 12 13:22:53 tiger2 genunix: [ID 409368 kern.notice] ^M100% done: 399746 pages dumped, compression ratio 1.95, /var/adm/messages.1:Jun 12 19:00:01 tiger2 genunix: [ID 409368 kern.notice] ^M100% done: 245417 pages dumped, compression ratio 2.41, /var/adm/messages.1:Jun 16 19:15:37 tiger2 genunix: [ID 409368 kern.notice] ^M100% done: 710001 pages dumped, compression ratio 3.48, /var/adm/messages.1:Jun 16 19:21:35 tiger2 genunix: [ID 409368 kern.notice] ^M100% done: 315989 pages dumped, compression ratio 3.66, /var/adm/messages.2:Jun 11 15:40:32 tiger2 genunix: [ID 409368 kern.notice] ^M100% done: 341209 pages dumped, compression ratio 2.68, This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
