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如何了解当前SGA内存分布情况？

tag-icon • tag-icon oracle oracle10g
如何了解当前SGA内存分布情况？

我如何获得当前的Oracle 10G 上的 SGA 内存分布？

像这样：

AME                                SIZE_MB RES
-------------------------------- ---------- ---
Maximum SGA Size                        396 No
Shared Pool Size                        320 Yes
Startup overhead in Shared Pool          32 No
Streams Pool Size                        32 Yes
Java Pool Size                           24 Yes
Buffer Cache Size                        16 Yes
Granule Size                              4 No
Redo Buffers                           2,79 No
Fixed SGA Size                         1,21 No
Free SGA Memory Available                 0
Large Pool Size                           0 Yes

我发现这张桌子Marko Sutic 的 Oracle 博客，但没有提供此类信息的查询。

答案1

好像select * from v$sgainfo ;

答案2

如果您可以以 sysdba 身份连接，则可以使用以下查询显示隐藏参数。

   MEG    GIG PARAMETER                           DESCRIPTION
------ ------ ----------------------------------- -----------------------------------------------------------------
    .0     .0 __large_pool_size                   Actual size in bytes of large pool
    .0     .0 __streams_pool_size                 Actual size in bytes of streams pool
    .0     .0 __shared_io_pool_size               Actual size of shared IO pool
 128.0     .1 __java_pool_size                    Actual size in bytes of java pool
 512.0     .5 db_recycle_cache_size               Size of RECYCLE buffer pool for standard block size buffers
2336.0    2.3 __shared_pool_size                  Actual size in bytes of shared pool
3072.0    3.0 db_keep_cache_size                  Size of KEEP buffer pool for standard block size buffers
3808.0    3.7 __db_cache_size                     Actual size of DEFAULT buffer pool for standard block size buffer
6240.0    6.1 __sga_target                        Actual size of SGA
8192.0    8.0 __pga_aggregate_target              Current target size for the aggregate PGA memory consumed

查询如下所示：

SYS AS SYSDBA> SELECT i.instance_name instance,
  2  -- b.ksppstvl "Session_Value",
  3  c.ksppstvl value,c.ksppstvl/1024/1024 meg,c.ksppstvl/1024/1024/1024 gig,
  4  -- above is instance_value
  5  a.ksppinm "PARAMETER",KSPPDESC "DESCRIPTION"
  6  FROM
  7  x$ksppi a,
  8  x$ksppcv b,
  9  x$ksppsv c,
 10  v$instance i
 11  WHERE
 12  a.indx = b.indx
 13  AND
 14  a.indx = c.indx
 15  AND
 16  (a.ksppinm LIKE '/_/_%' escape '/' or a.ksppinm LIKE 'db_keep_cache_size' or a.ksppinm LIKE 'db_recycle_cache_size')
 17  and a.ksppinm not in ('__oracle_base')
 18  and c.ksppstvl not in ('TRUE','FALSE')
 19  order by 3
 20  /

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