Tivoli Storage Manager for MVS and OS/390 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, the server 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, the server does not fix any I/O pages. If you specify an integer from 1 to 64, the server 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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