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/*
*
*  Author  : Vishal Gupta
*  Purpose : Display SGA breakdown history from statspack data
*
*  Revision History:
*  ===================
*  Date       Author        Description
*  ---------  ------------  -----------------------------------------
*  05-Aug-07  Vishal Gupta  First Draft
*/
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COLUMN snap_time                     HEADING "Snap Time"                   FORMAT a18
COLUMN total                         HEADING "TotalSGA||(MB)"              FORMAT 9,999,999
COLUMN buffercache                   HEADING "BufferCache||(MB)"           FORMAT 9,999,999
COLUMN sharedpooltotal               HEADING "SharedPool|Allocated|(MB)"   FORMAT 9,999
COLUMN sharedpoolfree                HEADING "SharedPool|Free|(MB)"        FORMAT 9,999
COLUMN javapooltotal                 HEADING "JavaPool|Allocated|(MB)"     FORMAT 9,999
COLUMN javapoolfree                  HEADING "JavaPool|Free|(MB)"          FORMAT 9,999
COLUMN largepooltotal                HEADING "LargePool|Allocated|(MB)"    FORMAT 9,999
COLUMN largepoolfree                 HEADING "LargedPool|Free|(MB)"        FORMAT 9,999
COLUMN streamspooltotal              HEADING "StreamsPool|Allocated|(MB)"  FORMAT 9,999
COLUMN streamspoolfree               HEADING "StreamsPool|Free|(MB)"       FORMAT 9,999
COLUMN fixedsga                      HEADING "FixedSGA||(MB)"              FORMAT 9,999
COLUMN logbuffer                     HEADING "LogBuffer||(MB)"             FORMAT 9,999

SELECT TO_CHAR(A.snap_time,'DD-MON-YY HH24:MI:SS')                                              snap_time
     , ROUND(sum(bytes)/1024/1024)                                                              total
     , ROUND(sum(DECODE(pool,null, DECODE(name,'buffer_cache',bytes,0),0))/1024/1024)           buffercache
     , ROUND(sum(DECODE(pool,'shared pool', bytes,0))/1024/1024)                                sharedpooltotal
     , ROUND(sum(DECODE(pool,'shared pool', DECODE(name,'free memory',bytes,0),0))/1024/1024)   sharedpoolfree
     , ROUND(sum(DECODE(pool,'java pool', bytes,0))/1024/1024)                                  javapooltotal
     , ROUND(sum(DECODE(pool,'java pool', DECODE(name,'free memory',bytes,0),0))/1024/1024)     javapoolfree
     , ROUND(sum(DECODE(pool,'large pool', bytes,0))/1024/1024)                                 largepooltotal
     , ROUND(sum(DECODE(pool,'large pool', DECODE(name,'free memory',bytes,0),0))/1024/1024)    largepoolfree
     , ROUND(sum(DECODE(pool,'streams pool', bytes,0))/1024/1024)                               streamspooltotal
     , ROUND(sum(DECODE(pool,'streams pool', DECODE(name,'free memory',bytes,0),0))/1024/1024)  streamspoolfree
     , ROUND(sum(DECODE(pool,null, DECODE(name,'fixed_sga',bytes,0),0))/1024/1024)              fixedsga
     , ROUND(sum(DECODE(pool,null, DECODE(name,'log_buffer',bytes,0),0))/1024/1024)             logbuffer
FROM stats$SGAstat B, stats$SNAPSHOT A
WHERE A.db_unique_name = B.db_unique_name
AND A.instance_name = B.instance_name
AND A.SNAP_ID = B.SNAP_ID
and A.snap_time > sysdate - &&1
group by A.db_unique_name
       , A.instance_name
       , A.snap_time
ORDER BY SNAP_TIME asc;

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