Hi all
Starting a Series of 1 Day 1 Command for beginners
starts with vmstat command
command: vmstat
purpose: Reports virtual memory statistics.
syntax: vmstat [ -f ] [ -i ] [ -s ] [ -I ] [ -t ] [ -v ] [ -w] [ -l ] [ {
-p | -P } pagesize | ALL ] ALL ] [ PhysicalVolume ... ] [
Interval [ Count ] ]
The vmstat command reports statistics about kernel threads, virtual memory,
disks,
traps and pocessor activity. Reports generated by the vmstat command can be
used
to balance system load activity
examples:
1. To display a summary of the statistics since boot, enter:
# vmstat
2. To display five summaries at 2-second intervals, enter:
# vmstat 2 5
3. To display a summary of the statistics since boot including statistics
for logical disks scdisk1 and
scdisk2, enter:
# vmstat scdisk1 scdisk2
4. To display fork statistics, enter:
# vmstat -f
5. To display the count of various events, enter:
# vmstat -s
6. To display time-stamp next to each column of output of vmstat, enter:
# vmstat -t
7. To display the I/O oriented view with an alternative set of columns,
enter
# vmstat -I
8. To display the VMM statistics for all page sizes that are supported on
the system, enter:
# vmstat -p ALL
9. To display all the VMM statistics available, enter:
# vmstat -vs
file: /usr/bin/vmstat contains the vmstat command
it is a performance tuning command
regards,
dhanasekar
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