Tweaking _Shared_pool_reserved_min_alloc and ORA – 4031
Here comes one more article dedicated towards diagnosing ORA- 4031 and related parameters. While googling on ORA-4031 error or working on TAR with Oracle Support you will most likely hit…
Undo Tablespace Sizing
In this post I will be discussing various types of Undo extents which can be helpful in determining cause of ORA-30036 i.e unable to extend segment by %s in undo…
Sign on Letter to Larry Ellison on AWR and ASH Licensing
While surfing across the blog's, I found this particular link, a compaign which is aimed at getting free access to the ASH and AWR reports. I believe most of us…
HW enqueue contention with LOB
Definition Enqueues are local locks that serialize access to various resources. Enqueue wait event indicates a wait for a lock that is held by another session (or sessions) in an…
Shared Sub Pools
Today I will discuss about Shared pool subpools which have been introduced in release 9iR2 and higher (To be precise >9.2.0.5) and can be controlled by a hidden parameter "_kghdsidx_count…
Diagnostics For Database Hang
Many times Oracle DBA's are in a situation when the database is hung and does not seem to be responding. In some scenarios, state is such that you cannot even…
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