Janet,
I'll try to show you with one of our larger Hp's:
VMSTAT takes a number of parameters, my favorite are:
Report memory status every 5 minutes for 5 reports. The AVM column gives
available real memory. The FREE column indicates the amount of real and virtual
memory that us available.
nbrahms:/ora1:02:vmstat 5 5
procs memory page
faults cpu
r b w avm free re at pi po fr de sr in
sy cs us sy id
1 170 0 21179 434071 5 1 0 0 0 0 0 0
1197 966 20 4 75
1 172 0 22951 434041 7 1 0 0 0 0 0 1423
2848 607 15 2 83
0 173 0 24727 434041 1 0 0 0 0 0 0 1111
2168 408 16 1 84
1 172 0 22622 434041 0 0 0 0 0 0 0 1051
2091 306 5 1 94
0 173 0 23773 434041 0 0 0 0 0 0 0 951
1486 226 11 1 88
VMSTAT -s (lower case) provides a dump of the internal registers that recods
memory usage. In this case the MOST important parameter is "revolutions of the
clock hand". For each revolution of the 'clock hand' you've gone through your
entire swap file. Having a value > 0 is not necessarily bad depending on how
long the server has been running. In this case the server has been running for
25 days.
nbrahms:/ora1:02:vmstat -s
0 swap ins
0 swap outs
0 pages swapped in
0 pages swapped out
48058981 total address trans. faults taken
13914835 page ins
0 page outs
20587 pages paged in
0 pages paged out
10013365 reclaims from free list
13911293 total page reclaims
44 intransit blocking page faults
36560237 zero fill pages created
23993691 zero fill page faults
6415045 executable fill pages created
20587 executable fill page faults
0 swap text pages found in free list
3607270 inode text pages found in free list
0 revolutions of the clock hand <-----****
4750 pages scanned for page out
0 pages freed by the clock daemon
2146931554 cpu context switches
366656955 device interrupts
416856006 traps
2659952744 system calls
____________________Reply Separator____________________
Author: Janet Linsy <[EMAIL PROTECTED]>
Date: 5/24/2001 9:26 AM
Hi,
Thank you all for showing me how to check the Unix
memory. Is there a way to show how much is used and
how much is free?
Thank you!
Janet
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