Chapter 10. Migration and expiring data and indexes 239
Important keywords that affect the expiration performance are COMMITCNT, REQLIMIT, 
UNLOADMAX, and USERSMF:
/SM590000COMMITCNT 
This keyword specifies the number of fetches from the ARSOD and ARSODIND table that 
are to be performed between COMMITS. If this number is not specified, 1000 is used. If 
this number is 0, no commits are performed while fetching. This parameter is used only if 
Content Manager OnDemand for OS/390 Version 2 migrated index rows are being 
deleted.
/SM590000REQLIMIT 
This keyword specifies the maximum number of objects to send to the server in each 
request. The REQLIMIT keyword defaults to the ARS_EXPIRE_REQLIMIT parameter in the 
ars.cfg, or 100 if ARS_EXPIRE_REQLIMIT is not specified.
/SM590000UNLOADMAX
Specifies how many objects to hold in memory at any one time. The default is 100,000.
/SM590000USERSMF 
This keyword specifies the SMF record type that is written by the ARSSMFWR exit (if used). 
This parameter can be omitted if ARSSMFWR is omitted. For more information about the 
ARSSMFWR exit, see IBM Content Manager OnDemand for z/OS Configuration Guide, 
SC19-3363.
10.6  Expiring data on Content Manager OnDemand for i
In most circumstances, you must run Disk Storage Management (DSM) and Archived Storage 
Management (ASM) to expire data from Content Manager OnDemand for i.
10.6.1  Content Manager OnDemand expiration 
Disk Storage Management (DSM) is the process for performing Content Manager OnDemand 
based expiration. DSM performs the following functions:
/SM590000Controls the expiration of indexes and data from Content Manager OnDemand (if you do 
not use storage manager-based expiration).
/SM590000Migrates data from cache to the storage manager (if the Migrate Data from Cache option 
is not set to When data is loaded).
/SM590000Expires data from cache if Cache Data is set to Y es.
If you do not run DSM, your disk storage requirements for Content Manager OnDemand 
might be higher than expected. The number of objects that are stored in the integrated file 
system (IFS) might also be higher than necessary, which results in longer save and restore 
times.
If you want to configure Content Manager OnDemand so that DSM is not required in the 
future, see the section “Eliminating the need to run Disk Storage Manager (DSM)” in the latest 
Content Manager OnDemand for i Common Server Administration Guide, SC19-2792.
Note: If you have never run DSM, the first execution of the Start Disk Storage Management 
(STRDSMOND) command might last for an extended period.