Connor Mcdonald-一位Oracle极客为我们分享了一个
AIX平台上11g独享服务进程内存占用过量的问题，该问题最后被确认为Bug"11G SERVER PROCESSES CONSUMING MUCH MORE MEMORY THAT 10G OR 9I"，相关文档如下:
Memory Footprint For Dedicated Server Processes More Than Doubled After 11g Upgrade On AIX Platform [ID 1246995.1]
Bug 9796810: 11G SERVER PROCESSES CONSUMING MUCH MORE MEMORY THAT 10G OR 9I
Bug 10190759: PROCESSES CONSUMING ADDITIONAL MEMORY DUE TO 'USLA HEAP'
可以看到上述问题仅发生在从9i/10g升级到11g后，作为一个已确认的升级Bug值得我们大家去关注；最近几年这样的升级会越来越多，同时希望该Bug能在11.2.0.3中修复。
实际上我在10.2.0.3上就遇到过类似的
Process Large Footprints问题：用户在打上一个one-off patch[6110331]后单个server process的rss量明显上升，主机的内存使用量大幅提高，虽然这个问题同样提交了SR，但最后没有确认为Bug；用户试图询问Oracle GCS关于rss上升的原因，但语焉而不详。
Search Criteria:AIX 11.2
Memory Footprint For Dedicated Server Processes More Than Doubled After 11g Upgrade On AIX Platform (Doc ID 1246995.1)
1. Have you installed the patch 10190759 ?
Review the note:
Memory Footprint For Dedicated Server Processes More Than Doubled After 11g Upgrade On AIX Platform (Doc ID 1246995.1)
If you have not installed the patch ?
-->>there is one available for 11.2.0.2.0, 11.2.0.2.2, 11.2.0.2.3
If you need me to review the patches you have installed you can upload the opatch listing?
opatch lsinventory -patch -detail
2. If you have already installed the patch 10190759 then
The additional memory seen allocated to oracle processes in the 11.2 release is a consequence of the additional link options added to the oracle link
line, -bexpfull and -brtllib. The two link options were specifically added in 11.2.0.1 to support the online patching feature.
Patch Name or Number: 10190759
Changes in the make file have been implemented such that you can relink without these options (-bexpfull and -brtllib) to avoid
additional memory overhead incurred by adding these options.These changes are available via a one-off patch.
This is a known bug: BUG:10190759 - PROCESSES CONSUMING ADDITIONAL MEMORY DUE TO 'USLA HEAP'
Install Patch: 10190759