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Re: "SQL AREA" and "LIBARARY CACHE" size?

From: Tanel Poder <tanel.poder.003_at_mail.ee>
Date: Thu, 25 Sep 2003 03:44:48 -0800
Message-ID: <F001.005D10B0.20030925034448@fatcity.com>


As I understand SQL area is a subset of library cache which is a subset of shared pool.

Taking advantage the opportunity that Steve is here, I'd like to ask how does Oracle distinguish between recurrent and transient chunks? Is this hardcoded, that certain types of chunks go to transient end of LRU list and others go to rcr end or is this based on some kind of touch count as well, like in buffer cache LRU list?

Tanel.

>
> Hi Steve,
>
> Sorry for it, but I want to correct one thing that is ,
> it is Libarray cache which is subset of SQL area which intern subset of
> shared pool.
>
>
> With Regards,
> Manoj Kumar Jha
>
> --------------------------------------------------------------------------



>
> A transcendentalist engaged in auspicious activities does not meet with
> destruction either in this world or in the spiritual world; one who does
> good,
> is never overcome by evil.
> --------------------------------------------------------------------------


>
>
>
> "Steve Adams"
> <steve.adams_at_ixo To: Multiple recipients of
list ORACLE-L <ORACLE-L_at_fatcity.com>
> ra.com.au> cc:
> Sent by: Subject: RE: "SQL AREA"
and "LIBARARY CACHE" size?
> ml-errors_at_fatcit
> y.com
>
>
> 09/25/03 03:24
> PM
> Please respond
> to ORACLE-L
>
>
>
>
>
>
> Hi Manoj,
>
> Although the stats are confused, the "SQL area" is in fact a subset of the
> library cache. Cursors are cached in the library cache as namespace 0.
>
> You can exercise limited control over the memory usage by marking objects
> for keeping with DBMS_SHARED_POOL.KEEP. Otherwise, the retention of chunks
> and thus the relative size of these and other shared pool areas depends
> entirely how recently objects have been used, because they all share the
> same LRU mechanisms (although there is an additional subordinate LRU
> mechanism for the dictionary cache).
>
> @ Regards,
> @ Steve Adams
> @ http://www.ixora.com.au/ - For DBAs
> @ http://www.christianity.net.au/ - For all
>
> -----Original Message-----
> ManojKr Jha
> Sent: Thursday, 25 September 2003 6:35 PM
> To: Multiple recipients of list ORACLE-L
>
>
>
> How the ORACLE distribute and mange the size of variouse component in
> shared_pool....?
> There should be some criteria on which it disribute its toatl available
> memory to these component.
>
> Steve Adams/Jonathan, do you have any about these?
>
> Also are there any way to control the number and type of chunks in
> different buckets.
> If these can be manage I hope that lots of seriouse problem related to
> shared pool fragmentation and other issues can be easilly avoided?
>
>
> With Regards,
> Manoj Kumar Jha
>
> --------------------------------------------------------------------------
--

>
> ---------------------------------------
>
> A transcendentalist engaged in auspicious activities does not meet with
> destruction either in this world or in the spiritual world; one who does
> good,
> is never overcome by evil.
> --------------------------------------------------------------------------
--
>
> ---------------------------------------
>
>
>
>
> "bhabani s pradhan"
>
> <bhabaniindia_at_redif To: Multiple recipients
> of list ORACLE-L <ORACLE-L_at_fatcity.com>
> fmail.com> cc:
>
> Sent by: Subject: Re: "SQL AREA"
> and "LIBARARY CACHE" size?
> ml-errors_at_fatcity.c
>
> om
>
>
>
>
>
> 09/25/03 01:04 PM
>
> Please respond to
>
> ORACLE-L
>
>
>
>
>
>
>
>
>
> You cannot control the sizes of sql area and library cache
> individually
>
> Regards
> ============
>
> On Thu, 25 Sep 2003 ManojKr Jha wrote :
> >
> >
> >
> >Hi,
> >
> >Any body have any idea about how to control the size of "library
> >cache" and
> >"sql area" in shared_pool?
> >
> >With Regards,
> >Manoj Kumar Jha
> >
> --------------------------------------------------------------------------
--
>
> ------------------------
>
> >
> >
> >A transcendentalist engaged in auspicious activities does not
> >meet with
> >destruction either in this world or in the spiritual world; one
> >who does
> >good,
> >is never overcome by evil.
> >
> --------------------------------------------------------------------------
--
>
> ------------------------
>
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person)
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> to Tata Consultancy Services. It must not be printed, read, copied,
> disclosed, forwarded, distributed or used (in whatsoever manner) by any
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is
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> attract legal action, civil and/or criminal. The contents of this message
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> Services on any subject matter. Any action taken or omitted to be taken
> based on this message is entirely at your risk and neither the originator
> of this message nor Tata Consultancy Services takes any responsibility or
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information
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endorsed
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Services.
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message
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> Author: ManojKr Jha
> INET: jmanoj_at_delhi.tcs.co.in
>
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-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Tanel Poder INET: tanel.poder.003_at_mail.ee Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
Received on Thu Sep 25 2003 - 06:44:48 CDT

Original text of this message

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