CSMJ sampler
The CSMJ sampler monitors the percentage of common storage use by each address space, and produces a warning for each one that meets or exceeds the specified thresholds.
This information allows you to take action before a common storage shortage adversely affects the entire system. The thresholds represent the percent of total available common storage that has been allocated by any single job name. Common storage is composed of the following areas:
- Common storage area (CSA)
- Extended common storage area (ECSA)
- Restricted use common storage area (RUCSA)
- Extended restricted use common storage area (ERUCSA)
- System Queue Area (SQA)
- Extended System Queue Area (ESQA)
Syntax
The parameters are defined as follows:
Parameter | Description |
|---|---|
int | Length of the sample period in intervals; the default sample period is 30 seconds (one interval) |
csa | Percentage allocation of CSA by any job that causes a warning message to be issued 1 |
ecsa | Percentage allocation of ECSA by any job name that causes a warning message to be issued 1 |
sqa | Percentage allocation of SQA by any job name that causes a warning message to be issued |
esqa | Percentage allocation of ESQA by any job name that causes a warning message to be issued |
1 When Restricted Use Common Storage Area (RUCSA) is defined in the system, the values specified for csapct and ecsapct also apply to RUCSA and Extended RUCSA (ERUCSA).
Warning messages
The following warning messages are issued by the CSMJ sampler:
PWSCSM01 *WARNING* jobName ASID HAS ALLOCATED commonStorageAllocated% OF commonStorageArea
Message PWSCSM01 indicates that the percentage of a common storage area allocated by a job exceeds the specified threshold, where
Variable | Description |
|---|---|
jobName | Specifies the job name |
ASID | Specifies the Address Space Identifier (ASID) |
commonStorageAllocated% | Specifies the percentage of the common storage area allocated that is by the job |
commonStorageArea | Specifies the common storage area (CSA, ECSA, RUCSA, ERUCSA, SQA, or ESQA) |
Related topic