Slow response and high utilisation on HP DL380 G4 servers
(Last modified: 05Sep2005)
This document (10097953) is provided subject to the disclaimer at the end of this document.
goal
Slow throughput of files and high utilization is seen on HP DL380 G4 servers running NetWare 6.5 SP2
fact
Novell NetWare 6.5 SP2
HP DL380 G4 server
symptom
Throughput of files from local or SAN volumes on the server is very slow
Processor utilization is at 100% for long periods of time when transferring files using Portal.nlm
Users experience slow logins to the server and/or disconnects
Throughput on HP DL380 G3 servers is normal, only HP DL380 G4 servers appear to be affected
change
Upgraded hardware from HP DL380 G3 to HP DL380 G4
cause
NetWare 6.5 SP2 is not always processing interrupts correctly in some shared interrupt configurations
fix
Apply NetWare 6.5 SP3
note
The HP DL380 G4 will generally configure its devices to share the same interrupt. Even if the user tries to assign each device a separate interrupt this will not be possible as there are only a few interrupts available (5, 7). In NetWare 6.5, the interrupts are managed by the ACPIDRV.PSM module which is loaded as the first line in the C:\NWSERVER\STARTUP.NCF file. With multiple devices sharing the same interrupt it appears that a conflict can arise which results in the throughput of these devices being affected. In addition, processor utilization will often climb to 100% whilst this problem is occurring. This problem will show symptoms such as slow file copies, console hangs, slow user logins and client disconnects.
After applying NetWare 6.5 SP3 which includes an updated ACPIDRV.NLM the problem is resolved.
document
Document Title: | Slow response and high utilisation on HP DL380 G4 servers |
Document ID: | 10097953 |
Solution ID: | NOVL102381 |
Creation Date: | 13Jun2005 |
Modified Date: | 05Sep2005 |
Novell Product Class: | Netware |
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