RE: Fun with WAIT Event "library cache: mutex X"
- From: "Taylor, Chris David" <ChrisDavid.Taylor@xxxxxxxxxxxxxxx>
- To: 'Niall Litchfield' <niall.litchfield@xxxxxxxxx>
- Date: Thu, 8 Dec 2011 12:12:40 -0600
Yeah I remembered that about Oracle going to full releases with the
latest/greatest patchsets.
The 'implications' of that decision though hadn't really sank in till today.
For each major patchset I will be downloading (or requesting on media) a very
large collection of data. And installing new Oracle home for each patchset
downloaded.
The download size is really the only negative in my mind.
Chris Taylor
Sr. Oracle DBA
Ingram Barge Company
Nashville, TN 37205
"Quality is never an accident; it is always the result of intelligent effort."
-- John Ruskin (English Writer 1819-1900)
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From: Niall Litchfield [mailto:niall.litchfield@xxxxxxxxx]
Sent: Thursday, December 08, 2011 12:04 PM
To: Taylor, Chris David
Cc: oracle-l@xxxxxxxxxxxxx
Subject: Re: Fun with WAIT Event "library cache: mutex X"
Chris, It's 4gb because its a complete release and not an old style patchset.
You don't get access to the source code, but kernel function calls are often
relevant to searchable MOS documents and so I'll often search for kglxgfde it
whatever the particular failing call is.
On Dec 8, 2011 4:48 PM, "Taylor, Chris David"
<ChrisDavid.Taylor@xxxxxxxxxxxxxxx<mailto:ChrisDavid.Taylor@xxxxxxxxxxxxxxx>>
wrote:
I'm running 11.2.0.2 Patch 10 on Windows x64 and I have a pl/sql procedure that
is rather simple, but kept erroring out after some time with an out memory
condition.
So, I decided to look and see what it is doing and it is encountering the
"library cache: mutex X" event.
Browing Oracle Support, I found the note about it and it says:
* "P3 = "where" = location in code (internal identifier) where mutex is
being waited for
@The meaning of the code for "where" can be found by looking in kgl0.h for
entries with the prefix ""kglml_XXX". For example, if P3=2, then it
corresponds to "kglml_kglget2". You can then search source code for this
symbol to see where the mutex is acquired.
Well, that's not very helpful to me since I don't have access to the source
code :) I understand that the engineers can use it.
Long story short, I decided to download the 11.2.0.3 patchset.
It is only *4 GIGABYTES*. I'm getting about 170k download speed on my work
network so......
Chris Taylor
Sr. Oracle DBA
Ingram Barge Company
Nashville, TN 37205
"Quality is never an accident; it is always the result of intelligent effort."
-- John Ruskin (English Writer 1819-1900)
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sender immediately and delete the contents of this message without disclosing
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