Portal | Manuals | References | Downloads | Info | Programs | JCLs | Master the Mainframes
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Usergroups Profile Log in to check your private messages Log in
 

 

Memory setup for CICS running JAVA

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> CICS
View previous topic :: :: View next topic  
Author Message
Nenad

New User


Joined: 06 Nov 2009
Posts: 9
Location: Croatia

PostPosted: Wed Jan 12, 2011 6:01 pm    Post subject: Memory setup for CICS running JAVA
Reply with quote

Hello,
is there anybody experienced in tuning memory pools in CICS running JAVA transactions?. We are unsure about the number of JVMs we could safely run.
Also in certain situations cics began restarting JVMs very frequently, we got many J9 TCB mismatches and cics consumes enormous CPU. Number of tasks is raising until eventually DSA memory is exhausted and CICS stops responding.
I can provide the CISC statistics if there is somebody to have a look.
Regards,

Nenad
Back to top
View user's profile Send private message

Bill O'Boyle

CICS Moderator


Joined: 14 Jan 2008
Posts: 2502
Location: Atlanta, Georgia, USA

PostPosted: Wed Jan 12, 2011 7:12 pm    Post subject: Reply to: Memory setup for CICS running JAVA
Reply with quote

When you say "DSA" are you referring to 24-Bit User Storage or 31-Bit, which is "EUDSA"?

In the SIT, what is your EDSALIM parameter set to?

If you're not sure, issue a CEMT INQ SYSTEM and review the DSALIMIT and the EDSALIMIT.

Hopefully, the majority of your application programs run in Key 9 (EXECKey : User) and DAtalocation : Any (program is linked as AMODE 31 RMODE ANY) or perhaps 64-Bit (above the bar), which Java supports.

Sounds like you're running Threadsafe, having these multiple Java TCB's?

If you are running Threadsafe, ensure the applicable PPT entries specify COncurrency : Threadsafe and meet compliance for Threadsafe.

If any GLUE's or TRUE's are being used, ensure they are Threadsafe compliant as well.

What is your CICS Version/Release?

IMHO, IBM has sold the Mainframe community false promises because I hear nothing but problems related to Java and CICS.

Bill
Back to top
View user's profile Send private message
Earl Haigh

Active User


Joined: 25 Jul 2006
Posts: 475

PostPosted: Thu Jan 13, 2011 7:21 am    Post subject:
Reply with quote

YUK, running JAVA transactions in CICS -- good luck with that ![/quote]
Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> CICS All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts Running an REXX EXEC implicitly sho7hills CLIST & REXX 3 Thu Apr 20, 2017 8:14 am
No new posts CICS Transaction Timeout Hooman24 CICS 2 Sun Apr 16, 2017 2:16 pm
No new posts Date and time format in CICS Chandru3183 CICS 2 Sat Mar 18, 2017 12:46 pm
No new posts Asynchronous CICS Processing Question moezbud CICS 1 Mon Mar 06, 2017 6:13 pm
No new posts CICS Question RE: Browse, Readnext an... moezbud CICS 7 Sun Mar 05, 2017 5:45 am


Facebook
Back to Top
 
Mainframe Wiki | Forum Rules | Bookmarks | Subscriptions | FAQ | Tutorials | Contact Us