It is general practice to keep the DB2 (v8 & higher) address spaces in the same service class, largely to keep an overall workload-serving balance. (We have ours with a goal of 60, importance 2; the actual values can be processor-dependent and interplay with your other workloads.)
xxxxDIST manages the TCP message flow and calls WLM to classify new DRDA (i.e., DDF) work and creates the enclaves that represents it. It must operate at a fairly high priority to keep the work and messaging flowing, and really doesn't consume much in the way of resources as an address space. To gain perspective, think of your batch workload: all (well, most) DB2 application work (the SQL) occurs with the priority of the batch job, even if the subsystem spaces are close to the top of the system. (DB2 application CPU is also charged back to the calling job.) Sometimes it's really mind-twisting, but if you can get your head around the enclave mechanism (as described in the posted references), it does make sense. .. John -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of George Dranes Sent: Wednesday, November 12, 2008 2:38 PM To: [email protected] Subject: Re: WLM and DB2 I should have pointed out that the SERVERS service class where xxxxDIST would be assigned has a velocity of 70% while the ONLPRD where xxxxDBM1, xxxxMSTR, and xxxxWLM address spaces would be assigned has a velocity of 50%. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html The information transmitted is intended only for the addressee and may contain confidential, proprietary and/or privileged material. Any unauthorized review, distribution or other use of or the taking of any action in reliance upon this information is prohibited. If you receive this in error, please contact the sender and delete or destroy this message and any copies. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
