Hi Prem,
I Think you are also doing the same mistake that I have done yesterday,
that was causing so much confusion.
I had earlier calculated the library cache and sql area size from X$ksmsp.
Please check the size of these component in x$ksmss.
WHat is difference in both x$ view is little bit confusing.
ORACLE try to calcluate SGASTAT from V$SGASTAT based on below mentioned
query:
===========
select inst_id,
'',
ksmssnam,
ksmsslen
from x$ksmfs
where ksmsslen>1
union all
select inst_id,
'shared pool',
ksmssnam,
sum(ksmsslen)
from x$ksmss
where ksmsslen>1
group by inst_id, 'shared pool', ksmssnam
union all
select inst_id,
'large pool',
ksmssnam,
sum(ksmsslen)
from x$ksmls
where ksmsslen>1
group by inst_id, 'large pool', ksmssnam
union all
select inst_id,
'java pool',
ksmssnam,
ksmsslen
from x$ksmjs
where ksmsslen>1
=====================
You can see the library cache and sql area size from :
select inst_id,
'shared pool',
ksmssnam,
sum(ksmsslen)
from x$ksmss
where ksmsslen>1
group by inst_id, 'shared pool', ksmssnam
===============
However at same time when when you you calculate these component from the
x$ksmsp using below mentioned SQL:
get different result:
SQL> l
select
ksmchcom contents,
sum(ksmchsiz) total
from
sys.x$ksmsp
where
inst_id = userenv('Instance')
group by ksmchcom
With Regards,
Manoj Kumar Jha
C-56 , Phase-2
NOIDA -201305, UP(INDIA)
Tata Consultancy Services
Ph No: (+91-120) 4461001 ext : 1037 (Off.)
Mobile No : 9810090974
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good,
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Prem Khanna J
<[EMAIL PROTECTED] To: Multiple recipients of list
ORACLE-L <[EMAIL PROTECTED]>
.co.jp> cc:
Sent by: Subject: Re: RE: "SQL AREA" and "LIBARARY
CACHE" size?
[EMAIL PROTECTED]
city.com
09/26/03
01:39 PM
Please
respond to
ORACLE-L
Hi Manoj,
this is the statistics i got from one of my instance.
sql area 225 MB
library cache 112 MB
I was also confused as u were [ i didn't notice this so far ].
but reading the replies of Tanel & Steve once again:
<tanel>
But what Steve meant (please correct me if I'm wrong), is that operations
on
sql areas are managed by library cache structures (library cache latch, KGL
manager, lib cache hash table, etc), so sql area is dependent on library
cache, despite the fact they both have memory allocated directly from
shared pool.
</tanel>
from this (and as per the docs) i understand that sql area is a subset of
library cache.
perhaps,what "subset" means is:
in terms of the control library cache has over sql area and not in terms
of memory allocated.
is my understanding correct, Tanel ?
<steve>
My best guess at the moment is that when new recreatable chunks are first
unpinned,
they go onto the transient list, and then when they have been reused, they
go back
onto the recurrent list.
</steve>
..and reading this post by Steve,i feel there is something more(a lot) that
we need to
know/understand to discuss about this.
Can Steve/Tanel/List explain me what is transient chunk & recurrent chunk ?
Regards,
Jp.
P.S.Thanx Naveen.
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