HOWTO : Understand TimesTen Autorefresh Cache UL Lock Contention On Oracle

(Doc ID 977856.1)

Last updated on SEPTEMBER 22, 2016

Applies to:

Oracle TimesTen In-Memory Database - Version and later
Information in this document applies to any platform.
***Checked for relevance on 25-Sep-2013***
***Checked for relevance on 05-Mar-2015***


On a system where two TimesTen data stores are autorefreshing from the same Oracle base table, high contention is seen on the UL Lock. This contention is displayed both in EM and by running an AWR report. 

The goal of this document is to answer whether this contention is anticipated and explain the reason for it.


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