Performance data files: QAPYDWTRC

 

This file provides specific trace info for each input/output (I/O) operation that occurred for the specified ASP. The following information applies if you have installed the latest PTFs.

One record is created per I/O operation.

Field Name Description Attribute
TCASPNUM ASP number. The number of the ASP where this I/O operation occurred. B (2)
TCDEVRNAME Device resource name. The resource name associated with this disk unit path. C (10)
TCSEGKEY Segment key. The identifier for the base segment where the I/O operation occurred. H (8)
TCPGMKEY Program or procedure key. The identifier for the program or procedure that requested or caused the I/O to occur. H (8)
TCTASKCNT Task count. The task count of the task dispatching element (TDE) that caused the I/O to occur. B (8)
TCDQDEPTH Deferred queue depth. If this I/O request was placed on the deferred queue, the number of I/O operations in the queue. If the I/O request was not placed on the deferred queue, this value will be 0. B (4)
TCSYNCIO Synchronous I/O. Indicates whether this I/O was addressed as synchronous.

  • 0 = this I/O was not addressed as synchronous.

  • 1 = this I/O was addressed as synchronous.
C (1)
TCRSYNCIO Requested synchronous I/O. Indicates whether this I/O was requested as synchronous.

  • 0 = this I/O was not requested as synchronous.

  • 1 = this I/O was requested as synchronous.
C (1)
TCMLTPTHIO Multipath I/O. Indicates whether this I/O was to a fiber attached device that supports multi-path I/O operations.

  • 0 = this I/O was to a device that does not support multi-path.

  • 1 = this I/O was to a device that supports multi-path.
C (1)
TCIOTYPE I/O type. Indicates the type of I/O.

  • R = I/O was a read.

  • W = I/O was a write.

  • O = I/O was a type other than a read or write.
C (1)
TCSUBUNIT Disk subunit. The mirroring subunit for which the I/O was performed.

  • ‘ ’ = Not part of a mirrored unit.

  • ‘A’ = The primary mirrored unit of a pair.

  • ‘B’ = The alternate mirrored unit of a pair.
C (1)
TCRESERVED Reserved. C (1)
TCPOOLNUM Pool number. The main storage management pool number for which the I/O occurred. This value will be zero if the pool number could not be retrieved. B (2)
TCIOFUNCTN I/O function. The I/O operation command number.

  • 0 = Other I/O function

  • 2 = Report status

  • 3 = Continuation

  • 4 = Device reset

  • 5 = Format DASD

  • 6 = Write buffer

  • 7 = Reallocate

  • 15 = Special function

  • 16 = Read

  • 17 = Read DASD parameters

  • 18 = Verify

  • 20 = Skip read

  • 22 = Read buffer

  • 32 = Write

  • 33 = Write pattern byte

  • 36 = Skip write

  • 37 = Inquiry

  • 119 = Query command status

  • 131 = Start reorganization

  • 132 = Allocate

  • 133 = Deallocate

  • 134 = Write directory

  • 135 = Scan read

  • 136 = Read directory

  • 137 = Query compression metrics

  • 138 = Discard temporary data
B (4)
TCSECTNUM Sector number. The sector number where the I/O operation began. B (8)
TCPAGECNT Page count. The number of pages in the I/O request. B (8)
TCSMIOTYPE Storage management I/O type. The storage management I/O type (this is the type of I/O from the perspective of the requester).

  • SFt = Segment address range fault

  • SCl = Segment address range clear

  • SRd = Segment address range read

  • SWt = Segment address range write

  • SRv = Segment address range remove

  • SUp = Segment address range unpin

  • SWp = Page out task write

  • STv = Segment address range trivial request

  • GRf = Access group read

  • GPg = Access group purge

  • SRP = Segment address range remove request IOP

  • SCP = Segment address range clear request IOP

  • GCP = Segment address range clear request POW

  • SUP = Segment address range unpin request IOP

  • SRQ = Segment address range read request IOP

  • GRQ = Segment address range read request POW

  • SFP = Segment address range fault request IOP

  • GFP = Segment address range fault request POW

  • SRR = Access group read IOP

  • GRR = Access group read POW

  • SWP = Segment address range write request IOP

  • GWP = Segment address range write request POW

  • GPP = Access group purge request IOP

  • SPw = Segment address range page out wait request

C (3)
TCIOHNDL I/O handle. The location on which the I/O operation is being performed. H (8)
TCDQTIME Deferred queue time. The time this operation request spent on the deferred I/O queue (in microseconds). B (8)
TCIOSTART I/O start time. The start time of the I/O operation (in microseconds from the creation of the session).

If the Deferred queue time is greater than zero, then this is also the time that the operation was placed on the deferred queue.

B (8)
TCIOEND I/O end time. The end time of the I/O operation (in microseconds from the creation of the session). B (8)
TCBUSNUM System bus number. The system bus number of the I/O device. B (2)
TCBOARDNUM System board number. The system board number of the I/O device. B (2)
TCCARDNUM System card number. The system card number of the I/O device. B (2)
TCIOAADDR I/O adapter address. The adapter address of the I/O device. B (2)
TCIOBUSNUM I/O bus number. The bus number of the I/O device. B (2)
TCIOCTRLAD I/O controller address. The controller address of the I/O device. B (2)
TCIODEVAD I/O device address. The device address of the I/O device B (2)
TCUNITNUM Unit number. The unit number for which the I/O occurred. B (2)
TCPGMOFSET Program offset. The offset of the program that requested or caused the I/O. B (8)
TCRESERVE1 Reserved. B (8)
TCRESERVE2 Reserved. B (8)
Related reference
Performance data files: Collection Services system category and file relationships Performance data files: File abbreviations