--On Friday, March 19, 2004 18:00:01 +0000 Simon Lorenz <[EMAIL PROTECTED]> wrote:
> I have a Solaris 8 system running Amanda that ginds to a hault when the > backups are running. Amanda and the sub processes take all avliable CPU. > This is dispite having compression set to none (using tape device). It is > primarily the snedbackup, dumper and ufsrestore processes that are causing > trhe issue. > > Any suggestions for stopping this would be much appreciated. > > load averages: 2.21, 2.21, 2.02 > 17:48:54 > 142 processes: 131 sleeping, 5 running, 1 zombie, 4 stopped, 1 on cpu > CPU states: 0.0% idle, 13.7% user, 76.9% kernel, 9.3% iowait, 0.0% swap > Memory: 768M real, 13M free, 729M swap in use, 3911M swap free The part that looks odd to me is the high kernel CPU usage. I would expect to see mostly user and iowat usage while running the backups. Are you backing up NFS or vxfs filesystems? Both of those drivers use kernel time, although I wouldn't expect the usage to be quite that high. How many dumps are you running in parallel? Perhaps reducing that number would give you an overall speedup Frank > > PID USERNAME THR PRI NICE SIZE RES STATE TIME CPU COMMAND > 10563 amanda 1 22 0 2232K 936K sleep 5:32 35.03% sendbackup > 10476 amanda 1 0 19 2640K 1920K run 2:26 15.04% dumper > 10568 amanda 1 32 0 11M 9928K sleep 1:49 12.55% ufsrestore > 10572 amanda 1 48 0 11M 2864K run 0:47 5.20% ufsdump > 10571 amanda 1 53 0 11M 2864K run 0:48 5.16% ufsdump > 10573 amanda 1 48 0 11M 2872K run 0:47 4.64% ufsdump > 10574 amanda 1 36 0 11M 3072K sleep 0:32 3.53% ufsdump > 10570 amanda 1 48 0 11M 7520K sleep 0:20 1.89% ufsdump > 10646 root 1 58 0 2104K 1208K cpu 0:01 0.35% top > > > Simon -- Frank Smith [EMAIL PROTECTED] Sr. Systems Administrator Voice: 512-374-4673 Hoover's Online Fax: 512-374-4501