SMF 42-6 DASD data set level I/O statistics

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Introduction

Fields

Stored in smsData

SMF Field DB Column name Description Unit
recType Value is always 042
SMF42PTS startTime Interval Start or OPEN time of day. This is zero if not available
SMF42DTE/TME endTime Date when the record was moved into the SMF buffer
seconds Time between start and end datetime second
SMF42SID sid System identification
S42DSN dsname Data set name
S42DSVOL volser Volume serial number
S42JDRSD/RST jobRdrTime Date reader recognized the JOB card for this job
S42JDJNM jobName Job name
S42JDUID racfUser User-defined identification field
S42JDPGN pgn Job performance group number
S42DSSC smsStorCls Storage class name
S42JDWSC wlmClass Workload Manager (WLM) Service Class Name
S42JDWLD wlmWorkload Workload Manager (WLM) workload name
S42DSFL1 dsDescrFlag Data set descriptor flag
S42DSCOD entryFlag Entry descriptor flag
S42DSDEV devnum Device number
SMF42SSI ssid Subsystem identification
S42JDCOD subType
  1. Close
  2. Interval record
S42DSTYP dsType Data set type
S42DSBSZ blkSize Block size. For concatenated data sets, this data is taken from the first data set
useCount
S42DSTRP stripes Number of stripes
S42DSION totIo Total number of I/Os
S42DSRDT totRead Total number of read operations
S42DSCND cacheIo Number of cache candidates
S42DSSEQ seqIo Number of sequential I/O operations
S42DSWCN writeIo Number of write candidates
S42DSRLC rlsIo Number of record level cache I/O operations
S42DSICL inhibitIo Number of inhibit cache load I/O operations
S42DSSHTS cacheHits Number of cache hits
S42DSWHI writeHits Number of write hits
S42AMSRB seqReadBlk Sequential read: number of blocks
S42AMDRB randReadBlk Direct read: number of blocks
S42AMSWB seqWriteBlk Sequential write: number of blocks
S42AMDWB randWriteBlk Direct write: number of blocks
S42AMZRB dirRead Number of directory reads
S42AMZWB dirWrite Number of directory writes
avgRespTime second
avgConnTime second
avgPendTime second
avgDiscTime second
avgQueueTime second
avgActvTime second
avgReadDiscTm second
S42DSMXR maxRespTime Maximum data set I/O response time second
S42DSMXS maxServTime Service time associated with maximum I/O response time second
S42AMSRR seqReadDly Sequential read: I/O delay second
S42AMDRR randReadDly Direct read: total I/O delay second
S42AMSWR seqWriteDly Sequential write: I/O delay second
S42AMDWR randWriteDly Direct write: total I/O delay second
S42AMZRR dirReadDly Directory read: I/O delay second
S42AMZWR dirWriteDly Directory write: I/O delay second
S42DSCOD isOpen Bit 0
S42JDCOD isClose True if subType == 0
S42JDCOD isInterval True if subType != 0
S42DSTYP isPs True if dsType == 1
S42DSTYP isPds True if dsType == 2
S42DSTYP isPdse True if dsType == 3
S42DSTYP isDa True if dsType == 4
S42DSTYP isHfs True if dsType == 10
S42DSTYP isVsam True if 16 <= dsType <= 22
actionId