> What happens when these x$constructs begin to consume large > amounts of memory? Is there an upper bound? Dan, can you think of a scenario where X$ constructs could consume enough memory that DBA marmots like us should meditate on them?
OT: Are there many grizzlies in CO? There are plenty here in MT and I always take my pepper spray with me whenever if go to the mountain top to comtemplate things Oracle and otherwise. Got within 100 yards of one and I saw him but he didn't see me. Steve Orr Bozeman, Montana -----Original Message----- Sent: Monday, September 29, 2003 9:45 AM To: Multiple recipients of list ORACLE-L You should have asked a grizzly bear. They're much wiser then marmots and they don't run away that easily. Also, when you see a grizzly bear 100ft away from you and realize that you only have a camera with you, then you begin to understand that there are bigger worries in this world then the location of database structures. What a grizzly would tell you is that, according to my sources, those tables are stored in the "misc" area of shared pool, which can easily be seen when selected * from V$SGASTAT. Here is what a grizzly would have in mind: POOL NAME BYTES ----------- -------------------------- ---------- shared pool 1M buffer 2098176 shared pool KGLS heap 4102928 shared pool PX subheap 76920 shared pool parameters 32796 shared pool free memory 101833708 shared pool PL/SQL DIANA 1028660 shared pool FileOpenBlock 3476816 shared pool PL/SQL MPCODE 547852 shared pool library cache 30858108 shared pool miscellaneous 11656764 shared pool pl/sql source 2708 -- Mladen Gogala Oracle DBA > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Daniel Fink > Sent: Monday, September 29, 2003 11:10 AM > To: Multiple recipients of list ORACLE-L > Subject: x$ constructs and memory > > > I was sitting on a mountain here in Colorado, pondering > Oracle optimization and an interesting scenario crossed my > feeble mind. As I began to ponder this (I asked the resident > marmot, but he must be a SQL*Server expert...), I came up > with several questions. > > Where in memory (sga or other) do the x$ constructs reside? > Some of them are 'populated' by reading file-based structures > (control file, datafile headers, undo segments). Does this > information reside in memory or is it loaded each time the x$ > construct is accessed? What happens when these x$constructs > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Orr, Steve INET: [EMAIL PROTECTED] 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: [EMAIL PROTECTED] (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).
