LRUS

onconfig.std
value

8

if not present

If MULTIPROCESSOR is set: MAX(4, NUMCPUVPS)If MULTIPROCESSOR is not set: 4

units

Number of LRU queues

range of values

For Extended Parallel Server on 32-bit platforms: 1 through 128

For Extended Parallel Server on 64-bit platforms:
1 through 512

takes effect

When shared memory is initialized

refer to

The following material:

• LRU queues in the shared-memory chapter of the IBM Informix: Administrator's Guide
• Chapter on configuration effects on memory in your IBM Informix: Performance Guide

LRUS specifies the number of LRU (least-recently-used) queues in the shared-memory buffer pool. You can tune the value of LRUS, in combination with the LRU_MIN_DIRTY and LRU_MAX_DIRTY parameters, to control how frequently the shared-memory buffers are flushed to disk.

Setting LRUS too high might result in excessive page-cleaner activity.