SGA之SQL

--查看诊断位置信息

select * from v$diag_info;

--查看sga中内存分配信息

select * from sys.x$ksmfs;

--查看内存块还剩余多少

select pool,name,bytes/1024/1024 MB from v$sgastat where name='free memory';

--查看共享池的使用情况比率

select to_number(v$parameter.value) value,v$sgastat.bytes/1024/1024 "v$sgastat MB",

(v$sgastat.bytes/v$parameter.value)*100 "percent free"

from v$sgastat,v$parameter where v$sgastat.name='free memory' and v$parameter.name='shared_pool_size'

and v$sgastat.pool='shared pool';

--查看SGA内各个易失存储器块的情况

select * from v$sga_dynamic_components

--查询动态调整SGA内存块还有多少可使用空间

select * from v$sga_dynamic_free_memory;

--SGA信息

select * from v$sgainfo

--可根据此视图调整SGA大小

select * from v$sga_target_advice