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The Question is:
When I use the reserved memory registry to put aside some pages for the Oracle
database's SGA, can I be assured that these pages will never be faulted to disk?
Oracle also has a startup parameter SGA_LOCK = TRUE and I don't know if it's of
any use in the context of the SGA being put in memory reserved for it. If the
memory will never be page faulted to disk then this parameter is of no use.
Memory Reservations (pages): Group Reserved In Use Type
ORA_INFRCS_SGA SYSGBL 66560 65292 Allocated
ORA_INFRCS_SGA SYSGBL 65 64 Page Table
Total (520.51 Mbytes reserved) 66625 65356
Thanks.
The Answer is :
Please contact Oracle support for information on Oracle products.
That said, your observation is correct. With the recent addition of
the reserved memory construct into OpenVMS, the SGA will never be
faulted out. No backing storage is required.
The use of the granularity hints mechanism provides for more
efficient use of the virtual memory (VM) translation buffers
(TBs), and this memory is not charged against the process
working set.
For information and for recommendations for Oracle-specific settings
such as the referenced SGA_LOCK mechansim, please contact Oracle.
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