DCMT DISPLAY LOG

DCMT DISPLAY LOG displays a message indicating the percentage of used space in the DDLDCLOG area of the data dictionary. It shows the number of pages read and written as well as the number of waits per log driver. Additionally, it indicates when log statistics were last reset because the read count overflowed.
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DCMT DISPLAY LOG displays a message indicating the percentage of used space in the DDLDCLOG area of the data dictionary. It shows the number of pages read and written as well as the number of waits per log driver. Additionally, it indicates when log statistics were last reset because the read count overflowed.
DCMT DISPLAY LOG is valid only when the system log is assigned to the database (the DDLDCLOG of the data dictionary). One action is available: DISPLAY.
This article describes the following information:
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Syntax
The following example shows the DCMT DISPLAY LOG syntax:
►►─── DCMT ─┬───────────────────┬─────────────────────────────────────────────►             └─ 
broadcast-parms
 ─┘  ►─── Display LOG ──┬───────────┬─────────────────────────────────────────────►◄                     └─ Drivers ─┘
Parameters
Following is a description of the DCMT DISPLAY LOG parameters:
  • broadcast-parms
    Indicates to execute the DCMT command on all or a list of data sharing group members. For more information about broadcasting and
    broadcast-parms
    syntax, see How to Broadcast System Tasks.
  • LOG
    Displays information for the system log and its associated log drivers.
  • Drivers
    Displays statistics for only the log drivers.
Usage
System Log
DCMT DISPLAY LOG displays the following information about the system log:
Field
Value
Used
Percentage of space currently used in the system log
Read
Number of log pages read
Written
Number of log pages written
Cumulative Number of Waits On Log Service Drivers
The number of waits on log service drivers since system startup, by any task
Total Number of Log Service Drivers Defined
The total number of log service drivers defined since system generation
Total Number of Log Service Drivers in Service
The total number of log service drivers currently in service
Total Number of Log Service Drivers Out Of Service
The total number of log service drivers currently out of service
Log Service Driver(s)
DCMT DISPLAY LOG displays the following information about the log service driver(s):
Field
Value
Task-ID
A list of task IDs of tasks running a log service driver
Reads
The number of reads performed by the identified task, since system startup
Writes
The number of writes performed by the identified task, since system startup
Errors
The number of errors by the identified task, since system startup
Waits
The number of waits performed by the identified task, since system startup
Examples
This section displays output for the DCMT DISPLAY LOG and DCMT DISPLAY LOG drivers.
DCMT DISPLAY LOG
      DISPLAY LOG IDMS-DC LOG AND LOG SERVICE DRIVER STATISTICS ------------------LOG PAGES------------------- USED                     READ          WRITTEN  54%                    1,119              997 CUMULATIVE NUMBER OF WAITS ON LOG SERVICE DRIVERS......6 TOTAL NUMBER OF LOG SERVICE DRIVERS DEFINED............3 TOTAL NUMBER OF LOG SERVICE DRIVERS IN SERVICE.........3 TOTAL NUMBER OF LOG SERVICE DRIVERS OUT OF SERVICE.....0 -------------------------------LOG SERVICE DRIVER-------------------------------    TASK-ID              READS           WRITES           ERRORS            WAITS          8                523              403                0                1          9                322              320                0                0         10                274              274                0                5 ---------------------------------END OF DISPLAY---------------------------------
DCMT DISPLAY LOG DRIVERS
     DISPLAY LOG DRIVERS -------------------------------LOG SERVICE DRIVER-------------------------------     TASK-ID             READS           WRITES           ERRORS            WAITS           8               907              747                0                2           9               618              616                0                1          10               525              525                0               36 ---------------------------------END OF DISPLAY---------------------------------
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