VCSMM Tunable Parameters
The following table describes tunable parameters for the VCSMM driver.:
| VCSMM Parameter
|
Description
|
Default Value
|
Minimum Value
|
Maximum Value
|
|---|
mm_deblog_sz
|
Size of VCSMM debug log in bytes.
|
65536
|
257
|
65536
|
mm_msglog_sz
|
Size of VCSMM message log in bytes.
|
128
|
128
|
65536
|
mm_slave_max
|
Max slaves per primary node. Value must be identical on each node.
|
256
|
256
|
32768
|
Configuring VCSMM Parameters
For parameter changes to take effect, reconfigure the VCSMM module using the following steps:
-
Shut down all Oracle service groups on the node:
# hagrp -offline oragrp -sys galaxy
-
Stop all Oracle client processes, such as sqlplus, svrmgrl, and gsd, on the node.
-
Unconfigure the VCSMM module:
# /sbin/vcsmmconfig -U
-
Unload the module:
# /usr/sbin/kcmodule vcsmm=unused
-
Configure the tunable parameter:
# /usr/sbin/kctune tunable=value
For example:
# /usr/sbin/kctune mm_slave_max=256
-
Start the VCSMM module:
# /sbin/init.d/vcsmm start
-
Bring the service groups online:
# hagrp -online oragrp -sys galaxy
|
