标签：text SQL 1000000 executions 内存 sql CPU select

查询最占资源、CPU、内存、和执行最长的SQL语句

花前月下人 2019-06-27 13:47:21  1155  收藏 分类专栏： oracle   oracle专栏收录该内容 1 篇文章0 订阅 订阅专栏

--当前执行sql语句
select a.SID,
       a.SERIAL#,
       a.USERNAME,
       b.PARSE_CALLS,
       b.PARSING_SCHEMA_NAME,
       b.CPU_TIME/1000000,
       b.ELAPSED_TIME/1000000,
       b.DISK_READS,
       b.DIRECT_WRITES,
       b.BUFFER_GETS,
       a.event,
        b.sql_text,
        b.SQL_FULLTEXT
  from v$session a inner join v$sqlarea b

 on a.SQL_HASH_VALUE = b. hash_value and b.PARSING_SCHEMA_NAME=upper('smsdb')

--物理读最高sql语句

select a.USERNAME,                                                     
       a. USER_ID,
       b.PARSE_CALLS,
       b.PARSING_SCHEMA_NAME,
       b.CPU_TIME/1000000,
       b.ELAPSED_TIME/1000000,
       b.DISK_READS,
       b.DIRECT_WRITES,
       b.BUFFER_GETS,
        b.sql_text,
        b.SQL_FULLTEXT
  from dba_users a inner join v$sqlarea b

 on a.USER_ID = b.PARSING_USER_ID and b.PARSING_SCHEMA_NAME=upper('smsdb') and disk_reads>1000000


--查询前10名执行最多次数SQL语句
select sql_text "SQL语句", executions "执行次数"
  from (select sql_text,
               executions,
               rank() over
               
               (order by executions desc) exec_rank
          from v$sqlarea)
 where exec_rank <= 10;
 
 
 --查询前10名占用CPU最高的SQL语句  
 select sql_text "SQL语句",
                       c_t "SQL执行时间（秒）",executions "执行次数",cs "每次执行时间（秒）"　from (select sql_text,
                       cpu_time /1000000 c_t,executions,ceil(executions/(cpu_time/1000000))cs,
                       rank() over(order by cpu_time desc) top_time
                  from v$sqlarea) where  top_time <= 10

--查询前10名执行时间最长SQL语句                  
select sql_text "SQL语句",
                       c_t "处理时间(秒)",executions "执行次数",cs "每次执行时间（秒）"
                from (select sql_text,
                       ELAPSED_TIME / 1000000 c_t,executions,ceil(executions/(ELAPSED_TIME/1000000))cs,
                       rank() over(order by ELAPSED_TIME desc) top_time
                  from v$sqlarea) where  top_time <= 10

--查询前10名最耗资源SQL语句                  
select sql_text "SQL语句",
                       DISK_READS "物理读次数",cs "每次执行时间（秒）"
                from (select sql_text,
                       ELAPSED_TIME / 1000000 c_t,executions,ceil(executions/(ELAPSED_TIME/1000000))cs,DISK_READS,
                       rank() over(order by DISK_READS desc) top_disk
                  from v$sqlarea) where  top_disk <= 10

 
--查询前10名最耗内存SQL语句                 
select sql_text "SQL语句",
                       BUFFER_GETS "内存读次数",cs "每次执行时间（秒）"
                from (select sql_text,
                       ELAPSED_TIME / 1000000 c_t,executions,ceil(executions/(ELAPSED_TIME/1000000))cs,BUFFER_GETS,
                       rank() over(order by BUFFER_GETS desc) top_mem
                  from v$sqlarea) where  top_mem <= 10

--查看锁表语句

 Select
c.sid,
c.serial#,
d.name,
b.object_name,
c.username,
c.program,
c.osuser
from gv$Locked_object a, All_objects b, gv$session c, audit_actions d
where a.object_id = b.object_id
and a.inst_id = c.inst_id(+)
and a.session_id = c.sid(+)
and c.command = d.action;

标签：text,SQL,1000000,executions,内存,sql,CPU,select
来源： https://www.cnblogs.com/yaoyangding/p/15713545.html

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。