Archive for April, 2008
Application Design and ORA – 4031
Much has been written on designing good application (which uses bind variables) so as to have better performance and avoid shared pool memory issues. Tom Kyte explains this on one of his post consequences of not using bind variables If you do not use bind variables and you [Read More]
Physical Corruption: ORA-1578 -Part 1
ORA-1578 is indication of physical block corruption. Oracle computes an internal checksum before fetching the block from disk, when it is about to fetch the block it reads the block header and compare the checksum stored in it. If the checksum mismatches we get ora-1578 [Read More]
Deciding “PROCESSES” parameter value
Many times we observe following error which corresponds to low setting of processes parameter. $ oerr ora 20 00020, 00000, “maximum number of processes (%s) exceeded” // *Cause: All process state objects are in use. // *Action: Increase the value of the [Read More]
ERRORSTACK- Oracle Debugging Event
One more post arising out of my frequent visits to Oracle forum Basically there was a question on “How to set events for ORA – 1652 errors” I had replied to the post but Aman asked me if I could provide any notes regarding Errorstack.I didn’t had one [Read More]
Changing Database Characterset With Export/Import Utilities
Recently there was a thread on Oracle Forums regarding change of Database characterset from WE8ISO8859P1 to AL32UTF8. User wanted to upgrade his database from 9i to 10g and also change the database characterset. He was looking forward to use either Export/Import utilities [Read More]
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 this parameter “_Shared_pool_reserved_min_alloc “ and find a advice for [Read More]
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 tablespace ‘%s’ and ORA-1555 – Snapshot too old Error While using Automatic Undo management (Set [Read More]
