Clients get disconnected from the server Error 8909.
(Last modified: 07Feb2003)
This document (10011290) is provided subject to the disclaimer at the end of this document.
fact
Novell GroupWise 5.2
Novell NetWare 4.11
symptom
Clients get disconnected from the server Error 8909.
Error: 8908
Users are getting disconnected when trying to open GroupWise
cause
Packet receive buffers was set very low.
fix
Referred to TIDs Performance, Tuning and Optimization 2943356 and 2943472
Physical Packet Receive Buffers
Receive buffers are used to store incoming packets from each of the networks attached to a NetWare server. The Maximum Physical Receive Packet Size should be set according to the kind of network it is on. In most cases, this is 1524 bytes for Ethernet segments, 4540 bytes for Token-Rings and FDDI and 618 bytes for Arcnet and LocalTalk. These values are taken from the "Novell BorderManager Installation and Setup" manual, the chapter on "Installing Novell BorderManager", page 9. Certain products installed have specific requirements in which you will need to refer to your manuals for instructions.
A good rule of thumb for the minimum packet receive buffers setting is approximately 2-3 receive buffer for each connection and maximum packet receive buffers to 4000 (or any higher value). Also, check the No ECB (Event control block) Available Count information in the LAN/WAN Information option in MONITOR.NLM. These messages indicate that the server was unable to acquire sufficient packet receive buffers, usually called event control blocks (ECBs). Running out of ECBs is not a fatal condition. Servers that run for several days where high loads occur in peaks might exceed the set maximum number of ECBs, causing the system to generate ECB system messages. If these situations are caused by occasional peaks in the memory demand, you should probably maintain your current maximum ECB allocation and allow the message to be generated at those times. On the other hand, if your server memory load is very high and you receive frequent ECB allocation errors, you should probably set your maximum ECB allocation higher. Use the following SET command in the AUTOEXEC.NCF file: SET MAXIMUM PACKET RECEIVE BUFFERS = number
Note that the memory allocated for ECBs cannot be used for other purposes. The minimum number of buffers available for the server can also be set in the STARTUP.NCF file with the following command: SET MINIMUM PACKET RECEIVE BUFFERS = number.
If the current Packet Receive Buffers rises above the minimum set level after the server has been up for a period of time, set the minimum Packet Receive Buffers to the current level.
document
| Document Title: | Clients get disconnected from the server Error 8909. |
| Document ID: | 10011290 |
| Solution ID: | 4.0.1443234.2203944 |
| Creation Date: | 25Jun1999 |
| Modified Date: | 07Feb2003 |
| Novell Product Class: | Groupware |
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