User Guide

Troubleshooting the NetWare Server 131
Server Operating System Administration Guide
103-000148-001
August 30, 2001
Novell Confidential
Manual 99a38 July 17, 2001
Memory Issues
 Insufficient RAM. Memory resources are critical in a server
environment.
To view buffer cache statistics for the NSS file system, enter the
following command at the System Console prompt:
NSS CACHESTATS
The best indicator for assessing server RAM in a traditional file system is
displayed in the following ways:
 In NetWare Remote Manager, click the View Memory Config link in
the navigation frame and then Traditional File System Cache
Statistics link, and view the LRU Sitting Time.
 In MONITOR, from the Available Options menu, select Disk Cache
Utilization and view the LRU Sitting Time.
The value of this field should be a minimum of 15 to 20 minutes. A
number lower than this indicates that the server’s memory resources
might be low. Another good indicator, Long Term Cache Hits, is
displayed on the same page or screen in either utility.
 Also see “Resolving Server Memory Problems” on page 136.
Novell eDirectory Issues
 eDirectory partitions. We recommend having no more than three
replicas of each partition in the tree. Efficient tree design is essential to
avoid utilization problems. Because Novell
®
eDirectory
TM
needs to
maintain synchronization among all servers in the replica ring, the more
replicas there are of any partition, the more traffic will be on the wire.
Three replicas are enough to provide fault tolerance and to allow for
eDirectory if a database were to become corrupt.
 eDirectory synchronization. To test the possibility that eDirectory
synchronization is the problem, turn off inbound and outbound
synchronization for an hour by setting dstrace=!D60.
After turning synchronization off, wait 5 to 15 minutes to allow the server
to catch up with queued work. Cancel the test by setting dstrace=!E.
 eDirectory errors. To test for other errors, run SET dstrace=On.