Comments on: Oracle 11g internals part 1: Automatic Memory Management http://blog.tanelpoder.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/?utm_source=rss&utm_medium=rss&utm_campaign=oracle-11g-internals-part-1-automatic-memory-management Oracle, Exadata, Performance, Troubleshooting - Mobile Life and Productivity. Wed, 08 Feb 2012 08:03:50 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Elora http://blog.tanelpoder.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/comment-page-1/#comment-11341 Elora Sun, 22 Jan 2012 16:11:26 +0000 http://tanelpoder.wordpress.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/#comment-11341 This "free sharing" of ifnomariton seems too good to be true. Like communism. This “free sharing” of ifnomariton seems too good to be true. Like communism.

]]> By: Rafi http://blog.tanelpoder.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/comment-page-1/#comment-9602 Rafi Mon, 05 Dec 2011 11:57:01 +0000 http://tanelpoder.wordpress.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/#comment-9602 Good post.With very nice explanation... Best regards, Rafi. Good post.With very nice explanation…

Best regards,

Rafi.

]]> By: gk http://blog.tanelpoder.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/comment-page-1/#comment-9152 gk Sat, 19 Nov 2011 17:47:27 +0000 http://tanelpoder.wordpress.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/#comment-9152 When we set a value for PGA_AGGREGATE_TARGET parameter, oracle can use more OS memory for PGA than what we set in PGA_AGGREGATE_TARGET when it is required, with 11g AMM does this work same way? Can oracle allocate more than MEMORY_MAX_TARGET for PGA when it is required? Thanks When we set a value for PGA_AGGREGATE_TARGET parameter, oracle can use more OS memory for PGA than what we set in PGA_AGGREGATE_TARGET when it is required, with 11g AMM does this work same way? Can oracle allocate more than MEMORY_MAX_TARGET for PGA when it is required?

Thanks

]]> By: Book Review: Oracle Database 11g Performance Tuning Recipes « Charles Hooper's Oracle Notes http://blog.tanelpoder.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/comment-page-1/#comment-8073 Book Review: Oracle Database 11g Performance Tuning Recipes « Charles Hooper's Oracle Notes Sat, 10 Sep 2011 21:13:39 +0000 http://tanelpoder.wordpress.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/#comment-8073 [...] or operating system specific problem areas/limitations (reference1 reference2 reference3 reference4 reference5 reference6).  Beyond telling the reader to simply add the current PGA_AGGREGATE_TARGET and [...] [...] or operating system specific problem areas/limitations (reference1 reference2 reference3 reference4 reference5 reference6).  Beyond telling the reader to simply add the current PGA_AGGREGATE_TARGET and [...]

]]> By: Reading Material On Order 2 « Charles Hooper's Oracle Notes http://blog.tanelpoder.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/comment-page-1/#comment-7353 Reading Material On Order 2 « Charles Hooper's Oracle Notes Sun, 29 May 2011 22:44:31 +0000 http://tanelpoder.wordpress.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/#comment-7353 [...] or operating system specific problem areas/limitations (reference1 reference2 reference3 reference4 reference5 reference6).  Beyond telling the reader to simply add the current PGA_AGGREGATE_TARGET and [...] [...] or operating system specific problem areas/limitations (reference1 reference2 reference3 reference4 reference5 reference6).  Beyond telling the reader to simply add the current PGA_AGGREGATE_TARGET and [...]

]]> By: Gopala Meapuram http://blog.tanelpoder.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/comment-page-1/#comment-6958 Gopala Meapuram Mon, 11 Apr 2011 19:25:46 +0000 http://tanelpoder.wordpress.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/#comment-6958 Tanel, Thank you. This is an excellent information that you are sharing. Quick question: Oracle says " The use of AMM is absolutely incompatible with HugePages." in of the notes of implementing HugePages. In case of hugepage implementations, how is Oracle using memory structure. Does it use System-V way of using SGA or POSIX way. We are using Hugepages. I see files getting created under /dev/shm. But number of files getting created directly corresponds to 'nattch' of ipcs. In this case, is there way to configure /dev/shm using tmpfs. Please reply with details if any on its usage in 11gR2 with respect to Hugepages. Thanks, Gopal Tanel,

Thank you. This is an excellent information that you are sharing.

Quick question:
Oracle says ” The use of AMM is absolutely incompatible with HugePages.” in of the notes of implementing HugePages.
In case of hugepage implementations, how is Oracle using memory structure. Does it use System-V way of using SGA or POSIX way.
We are using Hugepages. I see files getting created under /dev/shm. But number of files getting created directly corresponds to ‘nattch’ of ipcs.
In this case, is there way to configure /dev/shm using tmpfs.

Please reply with details if any on its usage in 11gR2 with respect to Hugepages.

Thanks,
Gopal

]]> By: Oracle Exadata Performance series – Part 1: Should I use Hugepages on Linux Database Nodes? | Tanel Poder's blog: IT & Mobile for Geeks and Pros http://blog.tanelpoder.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/comment-page-1/#comment-6536 Oracle Exadata Performance series – Part 1: Should I use Hugepages on Linux Database Nodes? | Tanel Poder's blog: IT & Mobile for Geeks and Pros Sun, 13 Mar 2011 18:55:23 +0000 http://tanelpoder.wordpress.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/#comment-6536 [...] how the AMM MEMORY_TARGET (/dev/shm) works from my article written back in 2007 when 11g came out ( Oracle 11g internals – Automatic Memory Management [...] [...] how the AMM MEMORY_TARGET (/dev/shm) works from my article written back in 2007 when 11g came out ( Oracle 11g internals – Automatic Memory Management [...]

]]> By: Kanwar http://blog.tanelpoder.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/comment-page-1/#comment-6125 Kanwar Thu, 06 Jan 2011 01:27:13 +0000 http://tanelpoder.wordpress.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/#comment-6125 Hi, Does the value of MEMORY_TARGET depend on the number of CPUs in any way? We have a situation where if we increase the # of CPUs (enable them -- OS is Solaris), then the cluster throws an <> error. Before the cpu count was increased, it was working fine. Thanks, Kanwar Hi,
Does the value of MEMORY_TARGET depend on the number of CPUs in any way? We have a situation where if we increase the # of CPUs (enable them — OS is Solaris), then the cluster throws an <> error. Before the cpu count was increased, it was working fine.

Thanks,
Kanwar

]]> By: Automatic Memory Management in 11g « Pavan DBA's Blog http://blog.tanelpoder.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/comment-page-1/#comment-4868 Automatic Memory Management in 11g « Pavan DBA's Blog Wed, 21 Jul 2010 08:29:18 +0000 http://tanelpoder.wordpress.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/#comment-4868 [...] Plz refer to below link where Tanel explained in wonderful way about this. http://blog.tanelpoder.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/ [...] [...] Plz refer to below link where Tanel explained in wonderful way about this. http://blog.tanelpoder.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/ [...]

]]> By: maclean http://blog.tanelpoder.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/comment-page-1/#comment-4746 maclean Thu, 10 Jun 2010 04:53:41 +0000 http://tanelpoder.wordpress.com/2007/08/21/oracle-11g-internals-part-1-automatic-memory-management/#comment-4746 Hi Tanel, Oracle support recommended do not use pre_page_sga with ASMM in 10g;If this parameter works well in 11g AMM env? Hi Tanel,
Oracle support recommended do not use pre_page_sga with ASMM in 10g;If this parameter works well in 11g AMM env?

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