November 2005
Intermediate to advanced
400 pages
9h 41m
English
book
Siebel 7.8 with IBM DB2 UDB V8.2 Handbook
by Whei-Jen Chen, Priti Desai, Ujwala Devi, Sreeman Kancherla, Venkatram Menakuru, Raghu Ramaswamy, Scott Saunders, Arjun Sirohi
Content preview from Siebel 7.8 with IBM DB2 UDB V8.2 Handbook
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Chapter 8. Performance tuning 239
Resolving deadlocks
There are three possible causes for deadlocks:
Lock wait
Lock escalations
Application logic and user SQL
For resolution or reduction of lock wait and lock escalations, use the techniques
mentioned in “Resolving lock escalations” on page 232.
It is worth considering the following points to reduce deadlocks caused due to
application logic and user SQL:
Release all locks held before switching contexts.
Do not access a given object from more than one context at a time.
Avoid concurrent DML, if possible.
For other suggestions, refer to “Resolution of lock wait and timeout” on page 230.
8.6.4 ...
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