set pages 1000
set lines 120
set heading off
column w_proc format a50 tru
column instance format a20 tru
column inst format a28 tru
column wait_event format a50 tru
set pages 1000
set lines 120
set heading off
column w_proc format a50 tru
column instance format a20 tru
column inst format a28 tru
column p1 format a16 tru
column p2 format a16 tru
column p3 format a15 tru
column seconds format a50 tru
column sincelw format a50 tru
column blocker_proc format a50 tru
column waiters format a50 tru
column chain_signature format a100 wra
column blocker_chain format a100 wra
select * from
(
select
'Current Process: '||osid W_PROC,
'SID: '||i.INSTANCE_NAME INSTANCE,
'INST #: '||wc.INSTANCE INST,
'Blocking Process: '||decode(wc.BLOCKER_OSID,null,'<none>',wc.BLOCKER_OSID)||' from Instance '||wc.BLOCKER_INSTANCE BLOCKER_PROC,
'Number of waiters: '||wc.NUM_WAITERS waiters,
'Final Blocking Process: '||decode(ps.spid,null,'<none>',ps.spid)||' from Instance '||s.FINAL_BLOCKING_INSTANCE FBLOCKER_PROC,
'Program: '||ps.program image,
'Wait Event: '||wc.WAIT_EVENT_TEXT wait_event,
'P1: '||wc.p1 p1,
'P2: '||wc.p2 p2,
'P3: '||wc.p3 p3,
'Seconds in Wait: '||wc.IN_WAIT_SECS Seconds,
'Seconds Since Last Wait: '||wc.TIME_SINCE_LAST_WAIT_SECS sincelw,
'Wait Chain: '||CHAIN_ID||' : '||CHAIN_SIGNATURE chain_signature,
'Blocking Wait Chain: '||decode(wc.BLOCKER_CHAIN_ID,null,'<none>',wc.BLOCKER_CHAIN_ID) blocker_chain
from v$wait_chains wc, gv$instance i,gv$session s,gv$session bs,gv$process ps
where wc.INSTANCE=i.INSTANCE_NUMBER(+)
and (wc.instance=s.inst_id(+) and wc.sid=s.sid(+) and wc.sess_serial#=s.serial#(+))
and (s.FINAL_BLOCKING_INSTANCE=bs.inst_id(+) and s.FINAL_BLOCKING_SESSION=bs.sid(+))
and (bs.inst_id = ps.inst_id(+) and bs.paddr = ps.addr(+))
and (wc.num_waiters > 0 or (wc.blocker_osid is not null and in_wait_secs > 10))
order by wc.CHAIN_ID,NUM_WAITERS desc
)
where rownum < 101;
Current Process: 117931 SID: orcl INST #: 1
Blocking Process: <none> from Instance Number of waiters: 2
Final Blocking Process: <none> from Instance
Program: Wait Event: SQL*Net message from client
P1: 1650815232 P2: 1 P3: 0 Seconds in Wait: 1375
Seconds Since Last Wait:
Wait Chain: 1 : 'SQL*Net message from client'<='enq: TX - row lock contention'
Blocking Wait Chain: <none>
Current Process: 122878 SID: orcl INST #: 1
Blocking Process: 117931 from Instance 1 Number of waiters: 0
Final Blocking Process: 117931 from Instance 1
Program: oracle@bigdata111 (TNS V1-V3) Wait Event: enq: TX - row lock contention
P1: 1415053318 P2: 655366 P3: 908 Seconds in Wait: 695
Seconds Since Last Wait:
Wait Chain: 1 : 'SQL*Net message from client'<='enq: TX - row lock contention'
Blocking Wait Chain: <none>
Current Process: 118052 SID: orcl INST #: 1
Blocking Process: 117931 from Instance 1 Number of waiters: 0
Final Blocking Process: 117931 from Instance 1
Program: oracle@bigdata111 (TNS V1-V3) Wait Event: enq: TX - row lock contention
P1: 1415053318 P2: 655366 P3: 908 Seconds in Wait: 1357
Seconds Since Last Wait:
Wait Chain: 2 : 'SQL*Net message from client'<='enq: TX - row lock contention'
Blocking Wait Chain: 1
进程122878和118052被117931进程阻塞，进程122878和118052都在等待enq: TX - row lock contention等待事件。
等待链中的根进程为117931，杀掉该进程将解除Hang等待链。
wait_chain_finalblocking.sh
|
#!/bin/bash
# by ray
# 2017-06-16
#v0.1
. ~/.bash_profile
sqlplus -s /nolog <<-RAY
conn / as sysdba
set pages 1000
set lines 120
set heading off
column w_proc format a50 tru
column instance format a20 tru
column inst format a28 tru
column wait_event format a50 tru
set pages 1000
set lines 120
set heading off
column w_proc format a50 tru
column instance format a20 tru
column inst format a28 tru
column p1 format a16 tru
column p2 format a16 tru
column p3 format a15 tru
column seconds format a50 tru
column sincelw format a50 tru
column blocker_proc format a50 tru
column waiters format a50 tru
column chain_signature format a100 wra
column blocker_chain format a100 wra
select * from
(
select
'Current Process: '||osid W_PROC,
'SID: '||i.INSTANCE_NAME INSTANCE,
'INST #: '||wc.INSTANCE INST,
'Blocking Process: '||decode(wc.BLOCKER_OSID,null,'<none>',wc.BLOCKER_OSID)||' from Instance '||wc.BLOCKER_INSTANCE BLOCKER_PROC,
'Number of waiters: '||wc.NUM_WAITERS waiters,
'Final Blocking Process: '||decode(ps.spid,null,'<none>',ps.spid)||' from Instance '||s.FINAL_BLOCKING_INSTANCE FBLOCKER_PROC,
'Program: '||ps.program image,
'Wait Event: '||wc.WAIT_EVENT_TEXT wait_event,
'P1: '||wc.p1 p1,
'P2: '||wc.p2 p2,
'P3: '||wc.p3 p3,
'Seconds in Wait: '||wc.IN_WAIT_SECS Seconds,
'Seconds Since Last Wait: '||wc.TIME_SINCE_LAST_WAIT_SECS sincelw,
'Wait Chain: '||CHAIN_ID||' : '||CHAIN_SIGNATURE chain_signature,
'Blocking Wait Chain: '||decode(wc.BLOCKER_CHAIN_ID,null,'<none>',wc.BLOCKER_CHAIN_ID) blocker_chain
from v\$wait_chains wc, gv\$instance i,gv\$session s,gv\$session bs,gv\$process ps
where wc.INSTANCE=i.INSTANCE_NUMBER(+)
and (wc.instance=s.inst_id(+) and wc.sid=s.sid(+) and wc.sess_serial#=s.serial#(+))
and (s.FINAL_BLOCKING_INSTANCE=bs.inst_id(+) and s.FINAL_BLOCKING_SESSION=bs.sid(+))
and (bs.inst_id = ps.inst_id(+) and bs.paddr = ps.addr(+))
and (wc.num_waiters > 0 or (wc.blocker_osid is not null and in_wait_secs > 10))
order by wc.CHAIN_ID,NUM_WAITERS desc
)
where rownum < 101;
exit;
RAY
|
注：内容摘录自：罗敏 <<感悟oracle核心技术>>
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/28572479/viewspace-2140829/ ，如需转载，请注明出处，否则将追究法律责任。
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