查看SGA和PGA使用率

select name,total,round(total-free,2) used, round(free,2) free,round((total-free)/total*100,2) pctused from  (select 'SGA' name,(select sum(value/1024/1024) from v$sga) total, (select sum(bytes/1024/1024) from v$sgastat where name='free memory')free from dual) union select name,total,round(used,2)used,round(total-used,2)free,round(used/total*100,2)pctused from ( select 'PGA' name,(select value/1024/1024 total from v$pgastat where name='aggregate PGA target parameter')total, (select value/1024/1024 used from v$pgastat where name='total PGA allocated')used from dual)   union select name,round(total,2) total,round((total-free),2) used,round(free,2) free,round((total-free)/total*100,2) pctused from ( select 'Shared pool' name,(select sum(bytes/1024/1024) from v$sgastat where pool='shared pool')total, (select bytes/1024/1024 from v$sgastat where name='free memory' and pool='shared pool') free from dual) union select name,round(total,2)total,round(total-free,2) used,round(free,2) free,round((total-free)/total,2) pctused from ( select 'Default pool' name,( select a.cnum_repl*(select value from v$parameter where name='db_block_size')/1024/1024 total from x$kcbwds a, v$buffer_pool p   where a.set_id=p.LO_SETID and p.name='DEFAULT' and p.block_size=(select value from v$parameter where name='db_block_size')) total, (select a.anum_repl*(select value from v$parameter where name='db_block_size')/1024/1024 free from x$kcbwds a, v$buffer_pool p  where a.set_id=p.LO_SETID and p.name='DEFAULT' and p.block_size=(select value from v$parameter where name='db_block_size')) free from dual) union   select name,nvl(round(total,2),0)total,nvl(round(total-free,2),0) used,nvl(round(free,2),0) free,nvl(round((total-free)/total,2),0) pctused from ( select 'KEEP pool' name,(select a.cnum_repl*(select value from v$parameter where name='db_block_size')/1024/1024 total from x$kcbwds a, v$buffer_pool p   where a.set_id=p.LO_SETID and p.name='KEEP' and p.block_size=(select value from v$parameter where name='db_block_size')) total, (select a.anum_repl*(select value from v$parameter where name='db_block_size')/1024/1024 free from x$kcbwds a, v$buffer_pool p  where a.set_id=p.LO_SETID and p.name='KEEP' and p.block_size=(select value from v$parameter where name='db_block_size')) free from dual) union select name,nvl(round(total,2),0)total,nvl(round(total-free,2),0) used,nvl(round(free,2),0) free,nvl(round((total-free)/total,2),0) pctused from ( select 'RECYCLE pool' name,( select a.cnum_repl*(select value from v$parameter where name='db_block_size')/1024/1024 total from x$kcbwds a, v$buffer_pool p   where a.set_id=p.LO_SETID and p.name='RECYCLE' and p.block_size=(select value from v$parameter where name='db_block_size')) total, (select a.anum_repl*(select value from v$parameter where name='db_block_size')/1024/1024 free from x$kcbwds a, v$buffer_pool p  where a.set_id=p.LO_SETID and p.name='RECYCLE' and p.block_size=(select value from v$parameter where name='db_block_size')) free from dual) union select name,nvl(round(total,2),0)total,nvl(round(total-free,2),0) used,nvl(round(free,2),0) free,nvl(round((total-free)/total,2),0) pctused from( select 'DEFAULT 16K buffer cache' name,(select a.cnum_repl*16/1024 total from x$kcbwds a, v$buffer_pool p   where a.set_id=p.LO_SETID and p.name='DEFAULT' and p.block_size=16384) total,   (select a.anum_repl*16/1024 free from x$kcbwds a, v$buffer_pool p  where a.set_id=p.LO_SETID and p.name='DEFAULT' and p.block_size=16384) free from dual) union select name,nvl(round(total,2),0)total,nvl(round(total-free,2),0) used,nvl(round(free,2),0) free,nvl(round((total-free)/total,2),0) pctused from( select 'DEFAULT 32K buffer cache' name,(select a.cnum_repl*32/1024 total from x$kcbwds a, v$buffer_pool p   where a.set_id=p.LO_SETID and p.name='DEFAULT' and p.block_size=32768) total,   (select a.anum_repl*32/1024 free from x$kcbwds a, v$buffer_pool p  where a.set_id=p.LO_SETID and p.name='DEFAULT' and p.block_size=32768) free from dual) union select name,total,total-free used,free, (total-free)/total*100 pctused from ( select 'Java Pool' name,(select sum(bytes/1024/1024) total from v$sgastat where pool='java pool' group by pool)total, ( select bytes/1024/1024 free from v$sgastat where pool='java pool' and name='free memory')free from dual) union select name,Round(total,2),round(total-free,2) used,round(free,2) free, round((total-free)/total*100,2) pctused from ( select 'Large Pool' name,(select sum(bytes/1024/1024) total from v$sgastat where pool='large pool' group by pool)total, ( select bytes/1024/1024 free from v$sgastat where pool='large pool' and name='free memory')free from dual) order by pctused desc;