my 'C' isnt very good, but I would assume CGA is allocated with malloc right? they are just dynamic allocations.
do you know what type of data structures oracle uses to sort? dynamic arrays or linked lists? > > From: "Steve Adams" <[EMAIL PROTECTED]> > Date: 2003/11/11 Tue AM 08:14:26 EST > To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> > Subject: RE: what is in the CGA? > > Hi Pawan, > > CGA = Call Global Area. It contains data structures that can be freed at the > end of the (parse, execute, fetch, ...) call. For example, if a sort while > executing a select statement exceeds the sort_area_retained_size any > additional sort memory required (up to the sort_area_size) will be allocated > in the CGA. Once the execute call has finished the entire CGA is freed, and > the extra sort memory with it. > > Physically, CGAs are subheaps of the PGA. The extents are identified as > "call heap" in PGA heap dumps. There can be more than one CGA present in a > PGA heap dump if a recursive call was under way when the PGA heap dump was > taken. > > @ Regards, > @ Steve Adams > @ http://www.ixora.com.au/ - For DBAs > @ http://www.christianity.net.au/ - For all > > -----Original Message----- > Satav, Pawan > Sent: Tuesday, 11 November 2003 8:55 PM > To: Multiple recipients of list ORACLE-L > > > Good info Steve. > > But what I want to ask is what is a CGA ? > > > Regards > Pawan > > > -----Original Message----- > Sent: Tuesday, November 11, 2003 1:24 PM > To: Multiple recipients of list ORACLE-L > > > Hi Ryan, > > The words "session specific" have to do with the difference between a > process and a session. Many Oracle environments run with just one user > session per process, but in general there can be multiple user sessions > being serviced by a single process. > > The UGA holds persistent data structures that are specific to a particular > session (even though other sessions may be connected through the same > process). By contrast, the PGA contains persistent data structures that are > specific to the process (not general to the instance) but must be visible to > all sessions connected via that process, and the CGA holds transient data > structures that are only required for the duration of a single call. > > The UGA consists of a small fixed area containing a few atomic variables, > small data structures and pointers. The rest of the UGA is a heap. Most of > the UGA heap is for private SQL and PL/SQL areas. So yes, package variables > and bind variable are there (although the bind meta-data is in the SGA) but > sort areas, row source buffers, and runtime state data are also major space > consumers. > > @ Regards, > @ Steve Adams > @ http://www.ixora.com.au/ - For DBAs > @ http://www.christianity.net.au/ - For all > > -----Original Message----- > [EMAIL PROTECTED] > Sent: Tuesday, 11 November 2003 12:14 AM > To: Multiple recipients of list ORACLE-L > > > I cant find any specifics in the docs. I must be missing something. All I > see is 'session specific information'? > > Does this mean package variables? SQLPLUS bind variables? What does this > mean? > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: Steve Adams > 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). > -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: <[EMAIL PROTECTED] 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).
