Storage Resource Manager Enterprise Edition Installation Guide

C–24 Storage Resource Manager Enterprise Edition
SRM Troubleshooting Guide
“Partition Could not be Scanned,” “Insufficient Virtual
Memory” or “Paging Space Exhausted (SIGDANGER)”
The Unix agent requires sufficient virtual memory to complete its scans, notably
Partition (file) scans. Virtual memory consists of RAM and Swap (also known as
Paging) space. The amount of virtual memory necessary is dependent on many
factors, including the number of directory levels and the number of managed points.
This problem may be transient (due to the scan running at the same time as other
applications which may use a large amount of virtual memory) or recurrent.
As a rule of thumb, 512MB of swap space should be configured. If there is insufficient
virtual memory to complete a scan, the scan will fail, and you will see the “Insufficient
Virtual Memory” message.
If any of these problems occur, try one of the following:
• Increase the amount of swap space available on the system.
• Reduce the number of managed directories to scan (and thus the amount of virtual
memory the scan requires).
• Change the scan schedule to avoid scans running at the same time as other
applications which may use a large amount of virtual memory.
• Reduce the number of records to be returned for Top N reports.
“Partition Could not be Scanned,” “Scan Time Exhausted”
For a partition (file) scan, the UNIX agent computes a maximum amount of elapsed
time for the scan, based on the number of files in the partition. This value has a
minimum of 10 minutes, but in general is based on the value of
FILESCAN_PER_SEC (default 50).
The agent sets an alarm timer to limit its execution to just the estimated scan time; it
will then terminate and return a Scan Time Exhausted error to SRM.
If scans are consistently timing out, then a couple of values in the
/etc/srmagent/agentconfig file should be examined:
• Perhaps FILESCAN_PER_SEC (the number of files which can be scanned per
second, default 50) should be reduced, or
• MAX_CONC_FILE_SCANS (the maximum number of concurrent file scans
which can run on a UNIX system, default 3) should be reduced.