This note gives abrief overview of bug 6270137.
The content was last updated on: 27-MAY-2009
Click
herefor details of each of the sections below.
Affects:
|
Product (Component) |
Oracle Server (Rdbms) |
|
Range of versions believed to be affected |
Versions BELOW 11.2 |
|
Versions confirmed as being affected |
|
|
Platforms affected |
Generic (all / most platforms affected) |
Fixed:
|
This issue is fixed in |
||||
Symptoms: |
Related To: |
|||
|
||||
Description
There is some unnecessary acquisition of the list header block (LISTHEAD)
in ASM.
REDISCOVERY INFORMATION
A symptom of this bug is long times to query v$asm related views such as
v$asm_disk , v$asm_file.
As we hold lhbp unnecessarily during these long scans, a cascading effect is
possible on various processes (archiver, lgwr, ...)
potentially slowing down instance(s) severely.
Sessions on ASM instances would wait for GCS lock open X , GCS lock esc X ,
buffer busy on a LISTHEAD buffer type...
Workaround
1. Until the fix is applied, disable dbconsole or Grid Control for the database/ASM
instance.
2. Stop any query referencing v$asm* views, specially v$asm_file.
HOOKS PSE:A204 PSE:A203 LIKELYAFFECTSXAFFECTS_10.2.0.1 XAFFECTS_V10020001 AFFECTS=10.2.0.1 XAFFECTS_10.2.0.2 XAFFECTS_V10020002AFFECTS=10.2.0.2 XAFFECTS_10.2.0.3 XAFFECTS_V10020003 AFFECTS=10.2.0.3XAFFECTS_10.2.0.4 XAFFECTS_V10020004 AFFECTS=10.2.0.4 XAFFECTS_11.1.0.6XAFFECTS_V11010006 AFFECTS=11.1.0.6 XPRODID_5 PRODUCT_ID=5 PRODID-5 RDBMSXCOMP_RDBMS COMPONENT=RDBMS TAG_ASM ASM FIXED_10.2.0.5 FIXED_11.1.0.7FIXED_11.2.0.1 FIXED_WIN:A203P31 FIXED_WIN:A204P15
|
Please note: The above is a summary description only. Actual symptoms can vary. Matching to any symptoms here does not confirm that you are encountering this problem. For questions about this bug please consult Oracle Support. |
References
Bug:6270137(This link will only work for PUBLISHED bugs)
Note:245840.1Information on the sections in this article