Administrator's Reference

FIXEDIOBUFSIZE

Specifies, in megabytes, how much virtual storage should be fixed for writing to and reading from disk storage pool volumes during the current server session. The default value is 0. A larger value may have better performance throughput to the Virtual Storage Access Method (VSAM) disk, but it also requires more memory. When you specify a value from 1 to 64, TSM also fixes the buffers for writing to the database and recovery log.

Syntax

>>-FIXEDIOBUFSIZE--megabytes-----------------------------------><
 

Parameters

megabytes
The number of megabytes as an integer from 0 to 64. If you specify 0, TSM does not fix any I/O pages. If you specify an integer from 1 to 64, TSM fixes the pages up to the number of megabytes that is specified.

Examples

Specify that 32MB of virtual storage should be fixed for writing to and reading from disk storage pool volumes:

fixediobufsize 32


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