VERITAS Volume Manager 4.1 Administrator's Guide

Performance Monitoring and Tuning
Performance Monitoring
Chapter 12 403
vol src 79174 23603 425472 139302 22.4 30.9
vol swapvol 22751 32364 182001 258905 25.3 323.2
Such output helps to identify volumes with an unusually large number of
operations or excessive read or write times.
To display disk statistics, use the vxstat -d command. The following is a
typical display of disk statistics:
OPERATIONS BLOCKS AVG TIME(ms)
TYP NAME READ WRITE READ WRITE READ WRITE
dm disk01 40473 174045 455898 951379 29.5 35.4
dm disk02 32668 16873 470337 351351 35.2 102.9
dm disk03 55249 60043 780779 731979 35.3 61.2
dm disk04 11909 13745 114508 128605 25.0 30.7
If the you need to move the volume named archive onto another disk, use
the following command to identify on which disks it lies:
# vxprint -tvh archive
The following is a typical display:
V NAME SETYPE STATE STATE LENGTH READPOL REFPLEX
PL NAME VOLUMEK STATE STATE LENGTH LAYOUT NCOL/WDTH MODE
SD NAME PLEX PLOFFS DISKOFFSLENGTH [COL/]OFF FLAGS
v archive fsgen ENABLED ACTIVE 20480 0 SELECT -
pl archive-01archive ENABLED ACTIVE 20480 0 CONCAT RW
sd disk03-03archive-010 409600 20480 0/0 c1t2d0
NOTE Your system may use a device name that differs from the examples. For
more information on device names, see Chapter 2, “Administering
Disks,” on page 63.
The subdisks line (beginning sd) indicates that the archive volume is on
disk disk03. To move the volume off disk03, use the following command:
# vxassist move archive !disk03 dest_disk