The default for all VSAM data sets is LSR. If multiple pools are supported CICS® provides for the use of pools 1 through 8.
The LSRPOOLID parameter specifies whether a file is to use LSR or NSR and, if LSR, which pool.
The LSRPOOLID parameter can be used in CICS systems with VSAM data sets.
All files with the same base data set, except read-only files with DSNSHARING(MODIFYREQS) specified in the file definition, must use either the same LSR pool or all use NSR.
SERVREQ=REUSE files cannot use LSR.
See VSAM tuning: general objectives. Consider removing files from an LSR pool.
The resource usage is defined by the LSRPOOL definition on the CSD. For more information about the CSD, see the CICS Resource Definition Guide.