IRLM Processing Parameters

This topic shows detailed information about System Parameters - IRLM Processing Parameters.

This block shows the system parameters for internal resource lock manager (IRLM) processing.

Note: The fields shown on this panel depend on the installed Db2 version.

System Parameters - IRLM Processing Parameters

The field labels shown in the following sample layout of System Parameters - IRLM Processing Parameters are described in the following section.


IRLM PROCESSING PARAMETERS                                     
--------------------------                                     
WAIT TIME FOR LOCAL DEADLOCK..............................5,000
NUMBER OF LOCAL CYCLES PER GLOBAL CYCLE.......................1
TIMEOUT INTERVAL.............................................30
IRLM MAXIMUM CSA USAGE ALLOWED................................0
Z/OS LOCK TABLE HASH ENTRIES..........................1,048,576
PENDING NUMBER OF HASH ENTRIES................................0
Z/OS LOCK TABLE LIST ENTRIES..............................8,282 
MAX 31-BIT IRLM PRIVATE STORAGE...............................0
MAX 64-BIT IRLM PRIVATE STORAGE...............................0

WAIT TIME FOR LOCAL DEADLOCK

Wait time for local deadlock.

Field Name: QWP5DLOK

NUMBER OF LOCAL CYCLES PER GLOBAL CYCLE

Number of local cycles per global cycle.

Field Name: QWP5DCYC

TIMEOUT INTERVAL

Timeout interval.

Field Name: QWP5TVAL

IRLM MAXIMUM CSA USAGE ALLOWED

The maximum amount of common service area that can be used by IRLM.

The amount of space needed for the common service area (CSA) below the 16 MB line is less than 40 KB for each Db2 subsystem and 24 KB for each IRLM. High concurrent activity, parallelism, or high contention can require more CSA.

Most of the Db2 common data resides in the extended common service area (ECSA). Most modules, control blocks, and buffers reside in the extended private area. A Db2 subsystem with 200 concurrent users and 2000 open data sets should need less than 2 MB of virtual storage below the 16 MB line.

Field Name: QWP5MCSA

Z/OS LOCK TABLE HASH ENTRIES

The number of z/OS lock table hash entries.

Field Name: QWP5HASH

PENDING NUMBER OF HASH ENTRIES

The number of z/OS lock table hash entries pending.

Field Name: QWP5PHSH

Z/OS LOCK TABLE LIST ENTRIES

The number of z/OS lock table list entries.

Field Name: QWP5RLE

MAX 31-BIT IRLM PRIVATE STORAGE

The maximum amount of 31-bit IRLM private storage that is available of the 2 GB virtual storage limit, for normal operations in IRLM. IRLM reserves an additional 10% of the 2 GB for use by requests in IRLM.

Field Name: QWP5BPM

MAX 64-BIT IRLM PRIVATE STORAGE

The maximum amount of 64-bit IRLM private storage that is available of the total amount of storage that is specified by MEMLIMIT, for normal operations in IRLM. IRLM reserves an additional 10% of the amount that is specified by MEMLIMIT for use by requests in IRLM.

Field Name: QWP5APM