Adjusts the Spin Lock mechanism used to control access to shared system resources.

PROMON Adjust Latch Options menu

The following shows a sample Adjust Latch Options menu.

01/25/02        OpenEdge Monitor (R&D)
16:34:27        Adjust Latch Options

                1. Spins before timeout         144000
                2. Record Free Chain Search Depth Factor: 5
                3. Enable LRU2 alternate buffer pool replacement policy
                4. Adjust LRU force skips:           0
                5. Adjust LRU2 force skips:          0

This menu contains the following:

  • Spins before timeout — Specifies a value to dynamically tune the Spin Lock mechanism. This mechanism can also be tuned using the Spin Lock Tries (-spin) parameter. For more information on spin locks, see Spin locks.
  • Record Free Chain Search Depth Factor — Displays the current setting for the searching the record chain for free space.
  • Enable(Disable) LRU2 alternate buffer pool replacement policy — Allows you to toggle the LRU replacement policy for the alternate buffer pool
  • Adjust LRU force skips — Specifies the number of times a buffer in the buffer pool is accessed before it is placed on the Most Recently Used (MRU) end of the LRU chain.
  • Adjust LRU2 force skips — Specifies the number of times a buffer in the alternate buffer pool is accessed before it is placed on the Most Recently Used (MRU) end of the LRU chain.