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vxmemstat - display memory statistics for Veritas Volume Manager
vxmemstat
[-e]
[-i interval [-t count]]
The
vxmemstat
utility prints memory statistics information.
This information can be system-wide, or it can
be specific to a Veritas Volume Replicator object.
-
-e
-
Prints extended memory statistics.
-
-i interval
-
Prints memory statistics
every interval seconds.
-
-t count
-
Prints the local system time every count intervals.
The time interval is specified using the -i interval
option.
The statistics are prefaced by a timestamp showing the current local
time on the system. Statistics are printed as a one-line output
record for each memory pool. The records are preceded by two header lines.
The output line consists of blank-separated fields. All numeric fields are
in units of kilobytes.
The following fields are displayed on each line:
-
Pool
-
Name of the memory pool. Memory consumers allocate memory from different
pools for different purposes.
-
DG
-
Name of the disk group in which the RVG is present.
-
Min Size
-
Minimum amount of memory always reserved for use by
consumers of the pool. As consumers require more memory, additional
memory is allocated to the pool for distribution to them.
-
Max Size
-
Maximum amount of memory that can be allocated to the pool. This
is equal to the value assigned to the maximum pool size system tunable
that corresponds to the pool.
-
In Use
-
Amount of memory (out of that allocated) currently being
used by consumers of the memory pool.
-
Allocated
-
Amount of memory currently allocated to the memory pool. The amount
of memory allocated to a pool ranges between the minimum and the maximum
pool size. The amount of allocated memory increases as more memory is
needed and decreases as it is relinquished.
-
Max Used
-
Maximum amount of memory used by consumers from this pool since system
startup.
This field is not shown if the -e option is specified.
-
Max Pool Used
-
Maximum amount of memory used by consumers from this pool
at any time since the last reboot. The value shows the maximum usage
even if usage by the pool has varied over this time period.
This field is shown if the -e option is specified.
-
Waiting
-
Indicates if any I/O is waiting to allocate memory from this pool.
This usually indicates that the corresponding tunable for the maximum
size of this pool needs to be increased.
This field is not shown if the -e option is specified.
-
Waiters
-
The number of requests that are waiting to allocate
memory from this pool.
This field is shown if the -e option is specified.
The
vxmemstat
utility exits with a non-zero status if the attempted operation fails.
A non-zero exit code is not a complete indicator of the problems
encountered, but rather denotes the first condition that prevented
further execution of the utility.
See
vxintro(1M)
for a list of standard exit codes.
To display statistics every 5 seconds and time stamp the output
every alternate interval, use the command:
vxmemstat -i 5 -t 2
vxintro(1M),
vxstat(1M)
Last updated: 31 Aug 2008
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