Xml Dom Parsing Is Slower In 11.1.0.7.0 Refer To Bug 7158121 (Doc ID 805693.1)

Last updated on FEBRUARY 08, 2017

Applies to:

Oracle Server - Enterprise Edition - Version 11.1.0.7 to 11.1.0.7 [Release 11.1]
Information in this document applies to any platform.
This problem can occur on any platform.

Symptoms

Parsing with dbms_xmldom is very slow in 11g compared to 10g

For comparison:


Time in 10.2.0.3.0 was 69.920 seconds for a specified code block

After upgrade to 11.1.0.6.0, time raised to 5193.937 seconds for the same exact piece of code and same data. After <patch 7158121> was applied and the time went to 529.467. Still very slow compared to 10.2.0.3.0 time which is 69 seconds.

In 11.1.0.7.0 after applying <PATCH 7158121> time went to 378.812 seconds. Still very slow compared to 10.2.0.3.0 time which is 69 seconds.

Here is a summary:
-
Test on 10.2.0.3.0:
Total Response Time: 69.920
---
Tests on 11.1.0.6.0 and 11.1.0.7.0 before and after applying <patch 7158121>
---
11.1.0.6.0 No Patch Total Response Time: 5193.937
11.1.0.6.0 With Patch Total Response Time: 529.467
11.1.0.7.0 No Patch Total Response Time: 2455.233
11.1.0.7.0 With Patch Total Response Time: 378.812

We also tried <patch 7342082> which improved time but still do not get the same performance as in 10g.

Cause

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