This section presents tips for optimizing various MVS features and important information for troubleshooting your system.
Optimizing Performance on Linux
These settings are recommended for optimizing MVS performance on Linux operating systems. To make these values permanent, modify the sysctl.conf and ifcfg-lo files as shown:
| File | Action |
|---|---|
| /etc/sysctl.conf | Add these lines to the end of the file: kernel.msgmni = 1024 kernel.sem = 1000 32000 32 512 kernel.shmmax = 2147483648 fs.file-max = 65535 net.ipv4.tcp_max_syn_backlog = 8192 net.ipv4.ip_local_port_range = 1024 65000 |
| /etc/sysconfig/network-scripts/ ifcfg-lo | Change the MTU value to 1500, or, if an MTU value does not exist, add MTU=1500 to the end of the file: |
When your changes have been made, save these files and restart the network using the following command:
/etc/init.d/network restart
MVS service does not shut down normally in Windows
To manually stop MVS services for Windows, open the Services dialog box from Administrative Tools and right-click the MVS Server service and select Stop. Then restart your system.
An Authentication or Socket Closed Exception Occurs
When a system is under very high load conditions with Ethernet hardware flow control (IEEE 802.3x) enabled, clients may experience authentication or socket closed exceptions depending on the specified pause time. In these scenarios it is recommended that the user do one of the following: