如何清除statspack相關表的歷史資料

2021-07-24 03:21:47 字數 3450 閱讀 5553

本次想清除2023年以前statspack相關表的歷史資料。

1.找出2023年1月1日之前對應最大的snap_id值

2.根據oracle db環境的官方提供的指令碼（$oracle_home/rdbms/admin/sptrunc.sql） 

declare


l_snap_id number := 103;


begin


delete from stats$filestatxs where snap_id <= l_snap_id;


delete from stats$tempstatxs where snap_id <= l_snap_id;


delete from stats$latch where snap_id <= l_snap_id;


delete from stats$latch_children where snap_id <= l_snap_id;


delete from stats$latch_misses_summary where snap_id <= l_snap_id;


delete from stats$latch_parent where snap_id <= l_snap_id;


delete from stats$librarycache where snap_id <= l_snap_id;


delete from stats$buffer_pool_statistics where snap_id <= l_snap_id;


delete from stats$rollstat where snap_id <= l_snap_id;


delete from stats$rowcache_summary where snap_id <= l_snap_id;


delete from stats$sga where snap_id <= l_snap_id;


delete from stats$sgastat where snap_id <= l_snap_id;


delete from stats$sysstat where snap_id <= l_snap_id;


delete from stats$sesstat where snap_id <= l_snap_id;


delete from stats$system_event where snap_id <= l_snap_id;


delete from stats$session_event where snap_id <= l_snap_id;


delete from stats$bg_event_summary where snap_id <= l_snap_id;


delete from stats$waitstat where snap_id <= l_snap_id;


delete from stats$enqueue_stat where snap_id <= l_snap_id;


delete from stats$sql_summary where snap_id <= l_snap_id;


delete from stats$sql_statistics where snap_id <= l_snap_id;


delete from stats$sqltext where last_snap_id <= l_snap_id;


delete from stats$parameter where snap_id <= l_snap_id;


delete from stats$resource_limit where snap_id <= l_snap_id;


delete from stats$dlm_misc where snap_id <= l_snap_id;


delete from stats$undostat where snap_id <= l_snap_id;


delete from stats$sql_plan where snap_id <= l_snap_id;


delete from stats$sql_plan_usage where snap_id <= l_snap_id;


delete from stats$seg_stat where snap_id <= l_snap_id;


--select * from stats$seg_stat_obj


delete from stats$db_cache_advice where snap_id <= l_snap_id;


delete from stats$pgastat where snap_id <= l_snap_id;


delete from stats$instance_recovery where snap_id <= l_snap_id;


delete from stats$snapshot where snap_id <= l_snap_id;


delete from stats$database_instance where snap_id <= l_snap_id;


commit;


exception


when others then


rollback;


end;
由於採用以上方法刪除資料非常慢，通常是刪除全部統計的歷史記錄。建議用oracle db使用者perfstat操作，具體方法如下：

sql> @$oracle_home/rdbms/admin/sptrunc.sql


warning


~~~~~~~


running sptrunc.sql removes all data from statspack tables. you may


wish to export the data before continuing.


about to truncate statspack tables


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


if would like to exit without truncating the tables, enter any text at the


begin_or_exit prompt (e.g. 'exit'), otherwise if you would like to begin


the truncate operation, press enter value for begin_or_exit:
在「enter value for begin_or_exit: 」處無需求輸入，直接回車就即可。

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