DOC HOME SITE MAP MAN PAGES GNU INFO SEARCH PRINT BOOK
 
Managing system performance

Outline of typical troubleshooting procedure

Checking Procedure Results Action
Error Messages Check non-graphical console screen filesystem full Move or remove files from that filesystem
Error Messages Check non-graphical console screen inode table overflow Increase number of inodes for that filesystem
Paging sar -pgruwd bad response, %(wio + idle) high, freemem often low, pfree/s and vscan/s high, swpots/s > 0 often, high disk %busy Increase memory
Disk Usage sar -udb bad response, high %(wio + idle), subset of disks have high %busy, avwait, or avque Balance disk load (move users)
Disk Usage sar -udb bad response, high %(wio + idle), all disks have high %busy, avwait, or avque Add disks
Buffer Usage sar -udb %(wio + idle) high, %rcache < 90, %wcache < 65, bread/s, bwrite/s high Increase BUFHWM
Modem Interrupts sar -y mdmin/s > 1 Repair modems, terminals, lines
Table Sizes sar -vt ov > 0 fail > 0 Increase table sizes
Job Schedules ps -ef Large batch jobs, non-essential commands or users Reschedule jobs or move jobs to other systems


Next topic: Samples of performance management procedures
Previous topic: Investigating performance problems

© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 22 April 2004