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Shared-Memory Buffer Control

Use the following parameters to control the shared-memory buffer pool.

Configuration
Parameter
Description
LRUS,
LRU_MAX_DIRTY,
LRU_MIN_DIRTY
Describe the shared-memory pool of pages (memory spaces) that the database server uses. These parameters relate to LRU (least recently used) queues. See LRU Queues.
CLEANERS
Controls the number of threads used to flush pages to disk and return the pages to the shared-memory pool. See Flushing Data to Disk.
RA_PAGES and RA_THRESHOLD
Control the number of disk pages that the database server reads ahead during sequential scans. See Configuring the Database Server to Read Ahead.
IDX_RA_PAGES and IDX_RA_THRESHOLD
Control the number of index pages that the database server reads ahead during index scans. See Configuring the Database Server to Read Ahead.
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