Oracle SGA MEMEORY SETTINGS , SGA_TRAGET , SGA_MAX_SIZE

Question

Hello Techies,
I have a production environment where one of the Databases RAM is set to 6G where as the RAM installed on the server is 8GB. We have the Grid agent installed on it and according to the Oracle Grid there is impact on the performance and RAM has to be extened to 7.2 GB.
Now my question is, whether we can extend this as we only have 8GB installed on the server. Will the left out 800 M is enough for the server?
Or Should we need to extend the RAM on the server and then extend the SGA_TARGET AND SGA_MAX_SIZE? if so can you suggest the values.
Could you shed some light on the cosiderations while we want to extend the SGA.
Server - Windows
DB - Oracle 10g
Thank you.
Regards,
RanG.

Answer 1

Hi sb92075,
Here is the query , consuming significant DB time from Oracle Grid ...
select e7.cmpcode as comp_no , e7.code as emcode , upper(a.add1) as user_name , upper(a.add2) as domain , upper(a.add3) as reviewer , upper(a.add4) as approver1 , upper(a.add5) as approver2 , a.emailaddr as email , l.cfvalue as costcentre , case e7.repcode3 when 'FRANCHISE' then '7001F' when 'STORE' then '7001S' else e7.cmpcode end as template , b.acnum as account , e7.name as account_holder
from xxxx.oas_element e7 inner join coda.oas_elmaddrlist a on (e7.cmpcode = a.cmpcode and e7.code = a.elmcode and e7.elmlevel=a.elmlevel and a.catagory='EXPPORTAL') inner join xxxx.oas_rllist l on (e7.cmpcode = l.cmpcode and e7.code = l.elmcode and e7.elmlevel=l.elmlevel) left join xxxx.oas_elmbanklist b on (e7.cmpcode = b.cmpcode and e7.code = b.elmcode and b.elmlevel=2 and b.defbank=1)
where e7.elmlevel=7 and e7.code like 'EM%' and l.lstseqno=1 and l.cffunction=0 and e7.cmpcode = '7001' and a.add1 is not null and a.add2 is not null and ((a.add3 is not null and a.add5 is not null and a.add2 = 'xxxx') or a.add2 != 'xxxx') and a.add4 is not null and b.acnum is not null and b.acname is not null
=========================
The other example of one of the 20 queries which run on this DB, i am sry for the lenght of the query ,
=============================
SELECT
  case 8 when 4 then 'T1' when 8 then 'T2' when 12 then 'T3' else 'Unknown' end,
  OAS_REPPACK.L1NAME,
  OAS_REPPACK.L1HDRTXT,
  OAS_REPPACK.L2NAME,
  OAS_REPPACK.L2HDRTXT,
  OAS_REPPACK.L3NAME,
  OAS_REPPACK.L3HDRTXT,
  OAS_REPPACK.L4NAME,
  OAS_REPPACK.L4HDRTXT,
  OAS_BALANCE.cmpcode,
  OAS_REPPACK.L5NAME,
  OAS_REPPACK.L5HDRTXT,
  OAS_REPPACK.LEAFNAME,
  OAS_REPPACK.LEAFHDRTXT,
  OAS_REPPACK.L2ORDER,
  OAS_REPPACK.L3ORDER,
  OAS_REPPACK.L4ORDER,
  OAS_REPPACK.L5ORDER,
-- Actual YTD --
SUM(OAS_BALANCE.FULL_VALUE
*CASE WHEN OAS_BALANCE.BALCODE = 'ACTUAL' THEN 1 ELSE 0 END
*CASE WHEN IIS_CURRENCY(case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end, 'XEUR', 'Entity Currency' ) =  OAS_BALANCE.CURCODE THEN 1 ELSE 0 END
*CASE WHEN  IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') <= 8 AND IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year') = 2013 THEN 1 ELSE 0 END
-- Actual YTD Last Year--
SUM(OAS_BALANCE.FULL_VALUE
*CASE WHEN OAS_BALANCE.BALCODE = 'ACTUAL' THEN 1 ELSE 0 END
*CASE WHEN IIS_CURRENCY(case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end, 'XEUR', 'Entity Currency' ) =  OAS_BALANCE.CURCODE THEN 1 ELSE 0 END
*CASE WHEN  IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') <= 8 AND IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year') = 2013-1 THEN 1 ELSE 0 END
-- Actual Full Year Last Year--
SUM(OAS_BALANCE.FULL_VALUE
*CASE WHEN OAS_BALANCE.BALCODE = 'ACTUAL' THEN 1 ELSE 0 END
*CASE WHEN IIS_CURRENCY(case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end, 'XEUR', 'Entity Currency' ) =  OAS_BALANCE.CURCODE THEN 1 ELSE 0 END
*CASE WHEN   IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') <= 9998 AND IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year') = 2013-1 THEN 1 ELSE 0 END
-- Budget YTD --
SUM(OAS_BALANCE.FULL_VALUE
*CASE
WHEN OAS_BALANCE.CURCODE = case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end AND 'Entity Currency' = 'Entity Currency'  THEN 1
WHEN OAS_BALANCE.CURCODE = case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end AND 'Entity Currency' = 'Group Currency'  THEN IIS_BUDGETRATES.RATE
ELSE 0 END
*CASE WHEN OAS_BALANCE.BALCODE = IIS_PFBALCODE(OAS_BALANCE.BALCODE, 'Calendar Year')||'BUDG' THEN 1 ELSE 0 END
*CASE WHEN  IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') <= 8 AND IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year') = 2013 THEN 1 ELSE 0 END
-- Budget Full Year --
SUM(OAS_BALANCE.FULL_VALUE
*CASE
WHEN OAS_BALANCE.CURCODE = case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end AND 'Entity Currency' = 'Entity Currency'  THEN 1
WHEN OAS_BALANCE.CURCODE = case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end AND 'Entity Currency' = 'Group Currency'  THEN IIS_BUDGETRATES.RATE
ELSE 0 END
*CASE WHEN OAS_BALANCE.BALCODE = IIS_PFBALCODE(OAS_BALANCE.BALCODE, 'Calendar Year')||'BUDG' THEN 1 ELSE 0 END
*CASE WHEN  IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year') = 2013 THEN 1 ELSE 0 END
-- Estimate 1 --
-- Actual T1--
SUM(OAS_BALANCE.FULL_VALUE
*CASE WHEN OAS_BALANCE.BALCODE = 'ACTUAL' THEN 1 ELSE 0 END
*CASE WHEN IIS_CURRENCY(case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end, 'XEUR', 'Entity Currency' ) =  OAS_BALANCE.CURCODE THEN 1 ELSE 0 END
*CASE WHEN  CASE WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') <=4 THEN 1 WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') BETWEEN 5 AND 8 THEN 2 WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') >= 9 THEN 3 END = 1 AND IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year') = 2013 THEN 1 ELSE 0 END
+
SUM(OAS_BALANCE.FULL_VALUE
*CASE WHEN OAS_BALANCE.BALCODE = IIS_PFBALCODE(OAS_BALANCE.BALCODE, 'Calendar Year')||'EST1' THEN 1 ELSE 0 END
*CASE WHEN  IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year') = 2013 AND IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') BETWEEN 5 AND 12 THEN 1 ELSE 0 END
  OAS_COMPANY.NAME,
  IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year'),
-- Budget T1--
SUM(OAS_BALANCE.FULL_VALUE
*CASE
WHEN OAS_BALANCE.CURCODE = case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end AND 'Entity Currency' = 'Entity Currency'  THEN 1
WHEN OAS_BALANCE.CURCODE = case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end AND 'Entity Currency' = 'Group Currency'  THEN IIS_BUDGETRATES.RATE
ELSE 0 END
*CASE WHEN OAS_BALANCE.BALCODE = IIS_PFBALCODE(OAS_BALANCE.BALCODE, 'Calendar Year')||'BUDG' THEN 1 ELSE 0 END
*CASE WHEN  CASE WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') <=4 THEN 1 WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') BETWEEN 5 AND 8 THEN 2 WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') >= 9 THEN 3 END = 1 AND IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year') = 2013 THEN 1 ELSE 0 END
-- Budget T2--
SUM(OAS_BALANCE.FULL_VALUE
*CASE
WHEN OAS_BALANCE.CURCODE = case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end AND 'Entity Currency' = 'Entity Currency'  THEN 1
WHEN OAS_BALANCE.CURCODE = case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end AND 'Entity Currency' = 'Group Currency'  THEN IIS_BUDGETRATES.RATE
ELSE 0 END
*CASE WHEN OAS_BALANCE.BALCODE = IIS_PFBALCODE(OAS_BALANCE.BALCODE, 'Calendar Year')||'BUDG' THEN 1 ELSE 0 END
*CASE WHEN  CASE WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') <=4 THEN 1 WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') BETWEEN 5 AND 8 THEN 2 WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') >= 9 THEN 3 END = 2 AND IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year') = 2013 THEN 1 ELSE 0 END
-- Budget T3--
SUM(OAS_BALANCE.FULL_VALUE
*CASE
WHEN OAS_BALANCE.CURCODE = case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end AND 'Entity Currency' = 'Entity Currency'  THEN 1
WHEN OAS_BALANCE.CURCODE = case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end AND 'Entity Currency' = 'Group Currency'  THEN IIS_BUDGETRATES.RATE
ELSE 0 END
*CASE WHEN OAS_BALANCE.BALCODE = IIS_PFBALCODE(OAS_BALANCE.BALCODE, 'Calendar Year')||'BUDG' THEN 1 ELSE 0 END
*CASE WHEN  CASE WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') <=4 THEN 1 WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') BETWEEN 5 AND 8 THEN 2 WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') >= 9 THEN 3 END = 3 AND IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year') = 2013 THEN 1 ELSE 0 END
-- Estimate 0 --
SUM(OAS_BALANCE.FULL_VALUE
*CASE
WHEN OAS_BALANCE.CURCODE = case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end AND 'Entity Currency' = 'Entity Currency'  THEN 1
WHEN OAS_BALANCE.CURCODE = case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end AND 'Entity Currency' = 'Group Currency'  THEN IIS_BUDGETRATES.RATE
ELSE 0 END
*CASE WHEN OAS_BALANCE.BALCODE = IIS_PFBALCODE(OAS_BALANCE.BALCODE, 'Calendar Year')||'EST0' THEN 1 ELSE 0 END
*CASE WHEN  IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year') = 2013 THEN 1 ELSE 0 END
-- Estimate 2 --
-- Actual T1--
SUM(OAS_BALANCE.FULL_VALUE
*CASE WHEN OAS_BALANCE.BALCODE = 'ACTUAL' THEN 1 ELSE 0 END
*CASE WHEN IIS_CURRENCY(case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end, 'XEUR', 'Entity Currency' ) =  OAS_BALANCE.CURCODE THEN 1 ELSE 0 END
*CASE WHEN  CASE WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') <=4 THEN 1 WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') BETWEEN 5 AND 8 THEN 2 WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') >= 9 THEN 3 END = 1 AND IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year') = 2013 THEN 1 ELSE 0 END
+
-- Actual T2--
SUM(OAS_BALANCE.FULL_VALUE
*CASE WHEN OAS_BALANCE.BALCODE = 'ACTUAL' THEN 1 ELSE 0 END
*CASE WHEN IIS_CURRENCY(case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end, 'XEUR', 'Entity Currency' ) =  OAS_BALANCE.CURCODE THEN 1 ELSE 0 END
*CASE WHEN  CASE WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') <=4 THEN 1 WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') BETWEEN 5 AND 8 THEN 2 WHEN IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') >= 9 THEN 3 END = 2 AND IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year') = 2013 THEN 1 ELSE 0 END
+
SUM(OAS_BALANCE.FULL_VALUE
*CASE
WHEN OAS_BALANCE.CURCODE = case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end AND 'Entity Currency' = 'Entity Currency'  THEN 1
WHEN OAS_BALANCE.CURCODE = case OAS_BALANCE.cmpcode when '7004' then 'SEK' when '7041' then 'SEK' when '7015' then 'USD' when '7042' then 'USD' else 'EUR' end AND 'Entity Currency' = 'Group Currency'  THEN IIS_BUDGETRATES.RATE
ELSE 0 END
*CASE WHEN OAS_BALANCE.BALCODE = IIS_PFBALCODE(OAS_BALANCE.BALCODE, 'Calendar Year')||'EST2' THEN 1 ELSE 0 END
*CASE WHEN  IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year') = 2013 AND IIS_PERIOD(OAS_BALANCE.PERIOD, 'Calendar Year') BETWEEN 9 AND 12 THEN 1 ELSE 0 END
FROM
  OAS_BALANCE,
  OAS_GRPLIST  OAS_GRPLIST1RP,
  OAS_ELEMENT  OAS_EL1,
  OAS_HIMLIST  OAS_REPPACK,
  OAS_COMPANY,
  IIS_BUDGETRATES,
  IIS_BOSEC_CC  IIS_BOSECURITY_BAL,
  SELECT DISTINCT USRCODE, USRNAME, COMPANY FROM IIS_BOSEC_CC
  )  IIS_BOSECURITY_CMP
WHERE
  ( OAS_COMPANY.CODE=OAS_BALANCE.CMPCODE  )
  AND  ( OAS_BALANCE.REPBASIS=0  )
  AND  ( OAS_EL1.ELMLEVEL=1  )
  AND  ( OAS_BALANCE.CMPCODE=OAS_EL1.CMPCODE and OAS_BALANCE.EL1=OAS_EL1.CODE  )
  AND  ( OAS_EL1.CMPCODE=OAS_GRPLIST1RP.CMPCODE and OAS_EL1.CODE=OAS_GRPLIST1RP.CODE and OAS_EL1.ELMLEVEL=OAS_GRPLIST1RP.ELMLEVEL and
(OAS_GRPLIST1RP.GRPCODE  LIKE '1RB%' OR
OAS_GRPLIST1RP.GRPCODE LIKE '1RP%')  )
  AND  ( OAS_REPPACK.GRPCODE=OAS_GRPLIST1RP.GRPCODE  )
  AND  ( OAS_REPPACK.CODE LIKE '1RP%'  )
  AND  ( IIS_BUDGETRATES.YR(+) =OAS_BALANCE.YR AND IIS_BUDGETRATES.PERIOD(+)=OAS_BALANCE.PERIOD AND
IIS_BUDGETRATES.BALCODE(+) = OAS_BALANCE.BALCODE AND
IIS_BUDGETRATES.CURCODE(+) = OAS_BALANCE.CURCODE  )
  AND  ( IIS_BOSECURITY_CMP.COMPANY=OAS_COMPANY.CODE  )
  AND  ( IIS_BOSECURITY_CMP.USRCODE=UPPER('exttino')  )
  AND  ( IIS_BOSECURITY_BAL.COMPANY=OAS_BALANCE.CMPCODE and IIS_BOSECURITY_BAL.COSTCENTRE=CASE  WHEN IIS_BOSECURITY_BAL.COSTCENTRE = 'ALL' THEN IIS_BOSECURITY_BAL.COSTCENTRE WHEN OAS_BALANCE.EL4 = ' ' THEN 'ALL' ELSE OAS_BALANCE.EL4 END  )
  AND 
    ( CASE WHEN 'Calendar Year' = 'Calendar Year'
          THEN OAS_BALANCE.YR
          WHEN 'Calendar Year' = 'Business Year'
          THEN CASE WHEN OAS_BALANCE.PERIOD <9    THEN OAS_BALANCE.YR ELSE OAS_BALANCE.YR+1 END
END +1 = 2013  )
    OR
    ( CASE WHEN 'Calendar Year' = 'Calendar Year'
          THEN OAS_BALANCE.YR
          WHEN 'Calendar Year' = 'Business Year'
          THEN CASE WHEN OAS_BALANCE.PERIOD <9    THEN OAS_BALANCE.YR ELSE OAS_BALANCE.YR+1 END
END = 2013  )
   AND
    ( IIS_BOSECURITY_BAL.USRCODE = UPPER('exttino')  )
    AND
    ( IIS_BOSECURITY_CMP.USRCODE = UPPER('exttino')  )
GROUP BY
  case 8 when 4 then 'T1' when 8 then 'T2' when 12 then 'T3' else 'Unknown' end,
  OAS_REPPACK.L1NAME,
  OAS_REPPACK.L1HDRTXT,
  OAS_REPPACK.L2NAME,
  OAS_REPPACK.L2HDRTXT,
  OAS_REPPACK.L3NAME,
  OAS_REPPACK.L3HDRTXT,
  OAS_REPPACK.L4NAME,
  OAS_REPPACK.L4HDRTXT,
  OAS_BALANCE.cmpcode,
  OAS_REPPACK.L5NAME,
  OAS_REPPACK.L5HDRTXT,
  OAS_REPPACK.LEAFNAME,
  OAS_REPPACK.LEAFHDRTXT,
  OAS_REPPACK.L2ORDER,
  OAS_REPPACK.L3ORDER,
  OAS_REPPACK.L4ORDER,
  OAS_REPPACK.L5ORDER,
  OAS_COMPANY.NAME,
  IIS_YEAR(OAS_BALANCE.YR, OAS_BALANCE.PERIOD, 'Calendar Year')
=============================
Regards,
RanG