PM71945: ECSA STORAGE MANAGEMENT ENHANCEMENT FOR BOTH IRLM 2.2 & 2.3

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• ECSA storage management improvement for both IRLM 220 & 230
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All HIR2220 (IRLM220) and HIR2230 (IRLM230)  *
  *                 users.                                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: MSGDXR175E IRLM is unable to obtain     *
  *                      storage - ECSA may appear on console    *
  *                      followed by IRA100E for SQA shortage.   *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  In a system running low on ECSA storage, the virtual storage
  manager may return a storage block below the 16M line when
  GETMAIN is called with option LOC=ANY. IRLM could accumulate CSA
  storage blocks in a short period of time causing CSA to fill up.
  This can happen typically with monitoring tools sending Query
  or Notify requests in a data sharing group. IRLM may not be able
  to quickly release the CSA/ECSA storage as it could run storage
  compression only at deadlock detection timer intervals which may
  not be aggressive enough to handle a spike of incoming NOTIFY or
  QUERY requests. This may lead to MSGDXR175E and/or IRA100E to
  be issued.
  

Problem conclusion

• This APAR improves CSA/ECSA storage management in IRLM. IRLM
  will not be acquiring any CSA storage below the line, and
  storage compression will be triggered sooner if MVS is unable
  to return the requested block size from ECSA.
  

Temporary fix

Comments

• ž**** PE13/08/14 FIX IN ERROR. SEE APAR PM90713  FOR DESCRIPTION
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UK91219 UK91220

Modules/Macros

•    DXRRL400 DXRRS464
  

Fix information

• Fixed component name

  IRLM V2

• Fixed component ID

  569516401

Applicable component levels

• R220 PSY UK91219

     UP13/02/12 P F302

• R230 PSY UK91220

     UP13/02/12 P F302

Fix is available

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