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Application Server

Interview with PeopleSoft Administrator Podcast

I recently recorded an interview with Dan Iverson and Kyle Benson for the PeopleSoft Administrator Podcast. It has been spread over three episodes. There is lots of other good stuff on the website and other episodes that are well worth listening to.

(25 March 2016) #21 - Temporary Tables

Measuring Tuxedo Queuing in the PeopleSoft Application Server

Why Should I Care About Queuing?

Queuing in the application server is usually an indicator of a performance problem, rather than a problem in its own right.  Requests will back up on the inbound queue because the application server cannot process them as fast as they arrive.  This is usually seen on the APPQ which is serviced by the PSAPPSRV process, but applies to other server processes too.  Common causes include (but are not limited to):

Minimum Number of Recycling Server Processes

When I rebuilt my demo system (some while ago) with PeopleTools 8.52, I noticed a new message generated by ubbgen in PeopleTools 8.52 when the minimum number of recycling servers is set to 1.
#eeeeee; border: 0px solid #000000; font-family: courier new; font-size: 85%; overflow: auto; padding-left: 4px; padding-right: 4px; width: 95%;">WARNING: PSAPPSRV, PSSAMSRV, PSQRYSRV, PSQCKSRV, PSPPMSRV and PSANALYTICSRV are configured with Min instance set to 1. 
To avoid loss of service, configure Min instance to at least 2.

What Produces the Message?

Minimum Number of Recycling Server Processes

When I rebuilt my demo system (some while ago) with PeopleTools 8.52, I noticed a new message generated by ubbgen in PeopleTools 8.52 when the minimum number of recycling servers is set to 1.
#eeeeee; border: 0px solid #000000; font-family: courier new; font-size: 85%; overflow: auto; padding-left: 4px; padding-right: 4px; width: 95%;">WARNING: PSAPPSRV, PSSAMSRV, PSQRYSRV, PSQCKSRV, PSPPMSRV and PSANALYTICSRV are configured with Min instance set to 1. 
To avoid loss of service, configure Min instance to at least 2.

What Produces the Message?

Configuring Large PeopleSoft Application Servers

Occasionally, I see very large PeopleSoft systems running on large proprietary Unix servers with many CPUs.  In an extreme case, I needed to configure application server domains with up to 14 PSAPPSRV processes per domain (each domain was on a virtual server with 8 CPU cores, co-resident with the Process Scheduler).

The first and most important point to make is don't have too many server processes.  If you run out of CPU or if you fully utilise all the physical memory and start to page memory from disk, then you have too many server processes.  It is better to queue on a Tuxedo queue rather than the CPU run queue, or disk queue during paging.

Multiple APPQ/PSAPPSRV Queues

Configuring Large PeopleSoft Application Servers

Occasionally, I see very large PeopleSoft systems running on large proprietary Unix servers with many CPUs.  In an extreme case, I needed to configure application server domains with up to 14 PSAPPSRV processes per domain (each domain was on a virtual server with 8 CPU cores, co-resident with the Process Scheduler).

The first and most important point to make is don't have too many server processes.  If you run out of CPU or if you fully utilise all the physical memory and start to page memory from disk, then you have too many server processes.  It is better to queue on a Tuxedo queue rather than the CPU run queue, or disk queue during paging.

Multiple APPQ/PSAPPSRV Queues