Before you begin: Your system
already has
the nonrestartable SMSPDSE address space. The restartable PDSE address
space (SMSPDSE1) is optional and available only for systems that use
PDSESHARING(EXTENDED). If you decide to start SMSPDSE1, there are
two PDSE address spaces in the system.
- The nonrestartable SMSPDSE address space is used for PDSEs
that
are contained in the LNKLIST.
- The restartable SMSPDSE1 address
space is used for all other PDSEs
in the system.
Perform the following steps to set up the SMSPDSE1 address space:
- Specify PDSESHARING(EXTENDED) in the IGDSMSxx parmlib
member.
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Example:
PDSESHARING(EXTENDED)
- Specify PDSE_RESTARTABLE_AS(YES)
in the IGDSMSxx parmlib
member.
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- Optionally, specify the values for the following IGDSMSxx parmlib
parameters to tune the SMSPDSE1 address
space:
- PDSE1_LRUCYCLES
- PDSE1_LRUTIME
- PDSE1_HSP_SIZE
- PDSE1_BMFTIME
- PDSE1_MONITOR
Example:
PDSE_RESTARTABLE_AS(YES)
PDSE1_MONITOR(YES)
PDSE1_LRUCYCLES(200)
PDSE1_LRUTIME(50)
PDSE1_HSP_SIZE(256)
PDSE1_BMFTIME(3600)
This example brings up the SMSPDSE1 address
space with the monitor turned on. The SMSPDSE1 address space uses
a hiperspace of 256 MB for caching PDSE member caching. SMS waits
3600 seconds before recording SMF records for BMF caching for the
SMSPDSE1 address space. The BMF waits 200 cycles before reusing inactive
buffers and 50 seconds before calling the BMF data space cache. Monitor
the SMF 42 type 1 record to determine the amount of caching activity
in the BMF data space and tune the PDSE1 parameters.
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- Optionally, specify the values for the following IGDSMSxx parmlib
parameters to tune the nonrestartable
SMSPDSE address space:
- PDSE_LRUCYCLES
- PDSE_LRUTIME
- PDSE_HSP_SIZE
- PDSE_BMFTIME
- PDSE_MONITOR
Example:
PDSE_MONITOR(YES)
PDSE_LRUCYCLES(250)
PDSE_LRUTIME(15)
PDSE_HSP_SIZE(256)
PDSE_BMFTIME(3600)
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- IPL the z/OS system to create the SMSPDSE and SMSPDSE1 address
spaces.
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To verify that both the SMSPDSE and SMSPDSE1 address spaces
exists
after you IPL z/OS, issue the following commands:
Example:
D A,SMSPDSE
D A,SMSPDSE1