1, according to the high number of CPU-intensive process to query SQL statement executed this process:
High CPU process numbers:
#首先找到CPU过高的进程号
# top -bn1 是静态找到占用最高的进程
[root@localhost ~]# top -bn1 | awk
'{print $1}'
| grep -A2 PID
Detailed command:
top: top command is commonly used under Linux performance analysis tools, real-time display resource usage status of each process in the system
-bn1: Show all the process information (top -bn 1 shows all process information, top -n a screen displaying a message for the pipeline call)
awk
'{print $1}':awk is used to extract the main toolbar;
{Print $} is to a line. 1 (a record) in a space as the first field delimiter print
grep -A2 PID: (see the process ID of the first two rows) - A: front how many rows and displaying the matched lines, such as: -A3, matching said display rows and first three rows
SQL statement:
SELECT
sql_text
FROM
V$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 =
'&pid'
))
ORDER
BY
piece
ASC
;
#######
ex:
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 =
'3515'
))
ORDER
BY
piece
ASC
;