概述
今天主要分享几个关于Oracle数据库的内存视图的脚本，仅供参考。
一、V$MEMORY_DYNAMIC_COMPONENTS
V$MEMORY_DYNAMIC_COMPONENTS displays information about the dynamic SGA components. This view summarizes information based on all completed SGA resize operations since instance startup. All sizes are expressed in bytes.
脚本： Provides information about dynamic memory components.
COLUMN component FORMAT A30
SELECT component,
ROUND(current_size/1024/1024) AS current_size_mb,
ROUND(min_size/1024/1024) AS min_size_mb,
ROUND(max_size/1024/1024) AS max_size_mb
FROM v$memory_dynamic_components
WHERE current_size != 0
ORDER BY component;
二、V$MEMORY_RESIZE_OPS
V$MEMORY_RESIZE_OPS displays information about the last 800 completed memory resize operations (both automatic and manual). This does not include in-progress operations. All sizes are expressed in bytes.
脚本：Provides information about memory resize operations.
SET LINESIZE 200
COLUMN parameter FORMAT A25
SELECT start_time,
end_time,
component,
oper_type,
oper_mode,
parameter,
ROUND(initial_size/1024/1024) AS initial_size_mb,
ROUND(target_size/1024/1024) AS target_size_mb,
ROUND(final_size/1024/1024) AS final_size_mb,
status
FROM v$memory_resize_ops
ORDER BY start_time;
三、V$MEMORY_TARGET_ADVICE
V$MEMORY_TARGET_ADVICE provides information about how the MEMORY_TARGET parameter should be sized based on current sizing and satisfaction metrics.
脚本3： Provides information to help tune the MEMORY_TARGET parameter.
SELECT * FROM v$memory_target_advice ORDER BY memory_size;
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