Requirements and guidelines Review the following requirements and guidelines when specifying Query Monitor subsystem parameters. Requirements for the CQMPARMS DDDb2® Query Monitor parameters are defined in an 80-byte sequential or partitioned data set that you must allocate to the CQMPARMS DD.Guidelines for CQMPARMS data set namesData set names in CQMPARMS must not resolve to lengths of greater than 38 bytes since the system appends ".DATA" and ".INDEX" to the end of VSAM data and index components.Guidelines for the non-SMS allocation of performance history filesDb2® Query Monitor STORCLASS, DATACLAS, MGMTCLAS, and VOLUME parameters (including DB2CDATA_VOLUME, EXCPDATA_VOLUME, EXCPINDX_VOLUME, METRDATA_VOLUME, OBJSDATA_VOLUME, SQLCDATA_VOLUME, TEXTDATA_VOLUME, and VOLUME) enable a site to make use of non-SMS managed volumes with Db2® Query Monitor performance history files.Common errors for invalid parameters valuesThese IKJ type messages can occur when an invalid value is specified in any of the parameters (including DB2CDATA_VOLUME, EXCPDATA_VOLUME, EXCPINDX_VOLUME, METRDATA_VOLUME, OBJSDATA_VOLUME, SQLCDATA_VOLUME, TEXTDATA_VOLUME, and VOLUME).Reducing memory consumption using CATALOG_OBJECTSWhen Db2® Query Monitor collects object details for a site that runs a large number of dynamic SQL statements, the number of catalog objects that are tracked by Db2® Query Monitor may grow quite large.Parent topic: Parameters