5.2.3.9 Controlling Access to PMEM Cache and PMEM Log
Note:
This topic applies only to Oracle Exadata System Software releases before 23.1.0. Otherwise, see Controlling Access to XRMEM Resources.
You can use IORM to manage access to persistent memory (PMEM) cache and PMEM log.
You can use the pmemcache
and
pmemlog
attributes in the interdatabase plan
to control access to PMEM cache and PMEM log.
When set in the interdatabase plan, these attributes control access by a
specific
database.
The following example shows how to disable PMEM cache and PMEM log for the
prod_test
and prod_dev
databases. In the example, PMEM log is also disabled for the
dw_test
database.
CellCLI> ALTER IORMPLAN -
dbplan=((name=prod, pmemcache=on, pmemlog=on), -
(name=dw, pmemcache=on, pmemlog=on), -
(name=prod_test, pmemcache=off, pmemlog=off), -
(name=prod_dev, pmemcache=off, pmemlog=off), -
(name=dw_test, pmemcache=on, pmemlog=off))
You can also use these attributes in conjunction with other attributes. For example:
CellCLI> ALTER IORMPLAN -
dbplan=((name=prod, share=8, pmemcache=on, pmemlog=on), -
(name=dw, share=6, pmemcache=on, pmemlog=on), -
(name=prod_test, share=2, pmemcache=off, pmemlog=off), -
(name=prod_dev, share=1, pmemcache=off, pmemlog=off), -
(name=dw_test, share=2, pmemcache=on, pmemlog=off), -
(name=other, share=1))
You do not need to explicitly set pmemcache=on
or pmemlog=on
because they are the default
settings.
Parent topic: Administering the IORM Plan