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Displaying IMS Latch Statistics (RLAT)

Displaying IMS Latch Statistics (RLAT)

IMS Latch Statistics panel

Certain services of IMS can only be used by one task at a time. Latches are used to serialize the use of these services. If you were to access the component for dynamic logging, for example, no other user would be able to perform the same function.

The IMS Latch Statistics panel (Figure 56 ) shows the types of latches, the number of times a latch was assigned exclusively or shared, and the number of IWAITS issued for the latch.

FIGURE 56. RLAT IMS Latch panel

+=========================== IMS Latch Statistics =============================+

| Period:

11:45 to 12:00 on 01/02/97

Elap =15:00 M

IMSD

|

+------------------------------------------------------------------------------+

| Latch|

Usage

| Exclusive | Shared

|

Waited

|

| Name | ||

| |

Latch | Assigned | Assigned | Latch | For Latch | |

+------+------------------------------------+-----------+----------+-----------+

| LOGL | | SMGT |

| XCNQ |

Logical Logger Storage Management

Exclusive Control ENQ/DEQ(PI)

| DMSG | | QMBP | | GCMD | | AUTH | | ACTL | | IOBH | | VSAM | | DBBP | | DMBE | | CBTS | | IENQ | | SMBQ | | DBLK |

HD Space Mangement Queue Buffer Management Global Command Processing Authorization Processing Statistics Logging ISAM/OSAM Buffer Manager VSAM Buffer Pool Latch Database Buffer Pool DMD Extended Dynamic Control Block IENQ - IDEQ SMBENQ - DEQ Free Dep Region Blocks

| |

|

0 0

| |

|

0 0

| |

|

0 2

| |

|

0

0

9

| | | | | | | | | | | | |

0 0 0 0 0 0 0 0 0 0 0 0 0

| | | | | | | | | | | | |

0 0 0 0 0 0 0 0 0 0 0 0 0

| | | | | | | | | | | | |

0 0 0 0 2 0 0 0 0 3 0 0 0

| | | | | | | | | | | | |

+------+------------------------------------+-----------+----------+-----------+

| TOTAL|

|

  • 0

    |

  • 0

    |

16

|

+==============================================================================+

The fields in the RLAT panel are described below.

Latch Name

Four-character name that IMS uses when referring to the latch.

Usage Exclusive Latch Assigned

A description of how the latch is used.

Average number of times a Getlatchrequest was granted for exclusive use of the latch.

Sample Resources Panels

159

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