Tuning Performance › VSAM Data Set Tuning › Performance Monitoring Facilities › Data Set Activity Tuning

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Data Set Activity Tuning

Use the SHOW NDB=ALL command to monitor the amount of concurrent SCAN activity that is occurring within your system. Then use the SYSPARMS, NDBSUBMN, and NDBSUBMX operands to tune activity appropriately.

Example

The following is an example of SHOW NDB=ALL command output.

(20.56)---------------- Operator Console Services (OCS) -----------------------
SHOW NDB=ALL
N89503 NAME     STATUS     QCMD  USERS CMDS-DONE SUBT QSUB DFR LSIZ LHWM TSILJR
N89504 RAMDB    ACTIVE        0      2       821    3    0 NO    40    4 NNNNNP
N89504 $ALERTH  ACTIVE        0      0         5    0    0 NO    40    1 NNNNNP
N89505 *END*
_______________________________________________________________________________

==> SHOW NDB=ALL