Oracle 查看CPU高的SQL语句

1.模拟插入大量的数据

SQL> create table t1(id int);

Table created.

declare
i number;
begin
for i in 1..10000000 loop
 insert into t1 values(i);
end loop;
commit;
end;
  9  /

2.使用top命令查看哪个进程占用CPU高

3080 oracle    20   0 2886944   1.2g   1.2g R  99.3 15.4   4:18.26 oracle_3080_orc

3.使用SQL语句查看

[oracle@node01 ~]$ sqlplus / as sysdba

SQL*Plus: Release 19.0.0.0.0 - Production on Mon Sep 13 09:21:46 2021
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.


Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0

SELECT sql_text
  FROM v$sqltext a
WHERE (a.hash_value, a.address) IN
       (SELECT DECODE(sql_hash_value, 0, prev_hash_value, sql_hash_value),
               DECODE(sql_hash_value, 0, prev_sql_addr, sql_address)
          FROM v$session b
         WHERE b.paddr = (SELECT addr FROM v$process c WHERE c.spid = '3080'))
  8  ORDER BY piece ASC
  9  ;

SQL_TEXT
--------------------------------------------------------------------------------
INSERT INTO T1 VALUES(:B1 )

这样可以很清晰的看到INSERT INTO T1 VALUES(:B1 )的时候占用了大量的CPU。