blocking sessions details.pdf

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Blocking sessions details

Find blocking sessions on instance:

col PROGRAM for a20

col EVENT for a20

col USERNAME for a8

col WAIT_CLASS for a10

set lines 200

select inst_id, SID, serial#, BLOCKING_SESSION,rpad(WAIT_CLASS,8)

WAIT_CLASS,SECONDS_IN_WAIT,PROGRAM, MODULE , EVENT ,username

from gv$session where BLOCKING_SESSION is not null order by BLOCKING_SESSION,PROGRAM;

To find the Details about SID.

col MODULE for a20

col OSUSER for a10

col USERNAME for a10

set num 10

col MACHINE for a20

set lines 200

col SCHEMANAME for a10

select s.INST_ID,s.sid,s.serial#,p.spid os_pid,s.status, s.osuser,s.username, s.MACHINE,s.MODULE,

s.SCHEMANAME,

s.action from gv$session s, gv$process p WHERE s.paddr = p.addr and s.sid = '&oracle_sid';

To know more details about SPID. Please run following query.

set echo off

set serveroutput on size 50000

set verify off

set feedback off

accept uxproc prompt 'Enter Unix process id: '

accept inst_id prompt 'Enter instance id: '

DECLARE

v_sid number;

vs_cnt number;

s sys.gv_$session%ROWTYPE;

p sys.gv_$process%ROWTYPE;

cursor cur_c1 is select sid from sys.gv_$process p, sys.gv_$session s where p.addr = s.paddr and (p.spid =

&uxproc or s.process = '&uxproc') and s.inst_id='&inst_id' and p.inst_id=s.inst_id;

BEGIN

dbms_output.put_line('=====================================================================');

select nvl(count(sid),0) into vs_cnt from sys.gv_$process p, sys.gv_$session s where p.addr = s.paddr and

(p.spid = &uxproc or s.process = '&uxproc') and s.inst_id='&inst_id' and p.inst_id=s.inst_id;dbms_output.put_line(to_char(vs_cnt)' sessions were found with ''&uxproc'' as their unix process id for the

instance number ''&inst_id');


open cur_c1;

LOOP

FETCH cur_c1 INTO v_sid;

EXIT WHEN (cur_c1%NOTFOUND);

select * into s from sys.gv_$session where sid = v_sid and inst_id='&inst_id';

select * into p from sys.gv_$process where addr = s.paddr and inst_id='&inst_id';

dbms_output.put_line('SID/Serial : ' s.sid','s.serial#);

dbms_output.put_line('Foreground : ' 'PID: 's.process' - 's.program);

dbms_output.put_line('Shadow : ' 'PID: 'p.spid' - 'p.program);

dbms_output.put_line('Terminal : ' s.terminal '/ ' p.terminal);

dbms_output.put_line('OS User : ' s.osuser' on 's.machine);

dbms_output.put_line('Ora User : ' s.username);

dbms_output.put_line('Details : ' s.action' - 's.module);

dbms_output.put_line('Status Flags: ' s.status' 's.server' 's.type);

dbms_output.put_line('Tran Active : ' nvl(s.taddr, 'NONE'));

dbms_output.put_line('Login Time : ' to_char(s.logon_time, 'Dy HH24:MI:SS'));

dbms_output.put_line('Last Call : ' to_char(sysdate-(s.last_call_et/60/60/24), 'Dy HH24:MI:SS') ' - ' to_char(s.last_call_et/60, '990.0') ' min');

dbms_output.put_line('Lock/ Latch : ' nvl(s.lockwait, 'NONE')'/ 'nvl(p.latchwait, 'NONE'));

dbms_output.put_line('Latch Spin : ' nvl(p.latchspin, 'NONE'));

dbms_output.put_line('Current SQL statement:');

for c1 in ( select * from sys.gv_$sqltext where HASH_VALUE = s.sql_hash_value and inst_id='&inst_id' order by

piece)

loop

dbms_output.put_line(chr(9)c1.sql_text);

end loop;

dbms_output.put_line('Previous SQL statement:');

for c1 in ( select * from sys.gv_$sqltext where HASH_VALUE = s.prev_hash_value and inst_id='&inst_id' order

by piece)

loop

dbms_output.put_line(chr(9)c1.sql_text);

end loop;

dbms_output.put_line('Session Waits:');

for c1 in ( select * from sys.gv_$session_wait where sid = s.sid and inst_id='&inst_id')

loop

dbms_output.put_line(chr(9)c1.state': 'c1.event);

end loop;-- dbms_output.put_line('Connect Info:');

-- for c1 in ( select * from sys.gv_$session_connect_info where sid = s.sid and inst_id='&inst_id') loop

-- dbms_output.put_line(chr(9)': 'c1.network_service_banner);

-- end loop;

dbms_output.put_line('Locks:');

Pgina 1 de 2Oracle Application DBA Posts: Blocking sessions details

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for c1 in ( select /*+ RULE */ decode(l.type,

-- Long locks

'TM', 'DML/DATA ENQ', 'TX', 'TRANSAC ENQ',

'UL', 'PLS USR LOCK',

-- Short locks

'BL', 'BUF HASH TBL', 'CF', 'CONTROL FILE',

'CI', 'CROSS INST F', 'DF', 'DATA FILE ',

'CU', 'CURSOR BIND ',

'DL', 'DIRECT LOAD ', 'DM', 'MOUNT/STRTUP',

'DR', 'RECO LOCK ', 'DX', 'DISTRIB TRAN',

'FS', 'FILE SET ', 'IN', 'INSTANCE NUM',

'FI', 'SGA OPN FILE',

'IR', 'INSTCE RECVR', 'IS', 'GET STATE ','IV', 'LIBCACHE INV', 'KK', 'LOG SW KICK ',

'LS', 'LOG SWITCH ',

'MM', 'MOUNT DEF ', 'MR', 'MEDIA RECVRY',

'PF', 'PWFILE ENQ ', 'PR', 'PROCESS STRT',

'RT', 'REDO THREAD ', 'SC', 'SCN ENQ ',

'RW', 'ROW WAIT ',

'SM', 'SMON LOCK ', 'SN', 'SEQNO INSTCE',

'SQ', 'SEQNO ENQ ', 'ST', 'SPACE TRANSC',

'SV', 'SEQNO VALUE ', 'TA', 'GENERIC ENQ ',

'TD', 'DLL ENQ ', 'TE', 'EXTEND SEG ',

'TS', 'TEMP SEGMENT', 'TT', 'TEMP TABLE ',

'UN', 'USER NAME ', 'WL', 'WRITE REDO ',

'TYPE='l.type) type,

decode(l.lmode, 0, 'NONE', 1, 'NULL', 2, 'RS', 3, 'RX',

4, 'S', 5, 'RSX', 6, 'X',

to_char(l.lmode) ) lmode,

decode(l.request, 0, 'NONE', 1, 'NULL', 2, 'RS', 3, 'RX',

4, 'S', 5, 'RSX', 6, 'X',

to_char(l.request) ) lrequest,

decode(l.type, 'MR', o.name,'TD', o.name,

'TM', o.name,

'RW', 'FILE#='substr(l.id1,1,3)

' BLOCK#='substr(l.id1,4,5)' ROW='l.id2,

'TX', 'RS+SLOT#'l.id1' WRP#'l.id2,

'WL', 'REDO LOG FILE#='l.id1,

'RT', 'THREAD='l.id1,

'TS', decode(l.id2, 0, 'ENQUEUE', 'NEW BLOCK ALLOCATION'),

'ID1='l.id1' ID2='l.id2) objname

from sys.gv_$lock l, sys.obj$ o

where sid = s.sid

and inst_id='&inst_id'

and l.id1 = o.obj#(+) )

loop

dbms_output.put_line(chr(9)c1.type' H: 'c1.lmode' R: 'c1.lrequest' - 'c1.objname);

end loop;


END LOOP;

dbms_output.put_line(to_char(vs_cnt)' sessions were found with ''&uxproc'' as their unix process id for the

instance number ''&inst_id');dbms_output.put_line('Please scroll up to see details of all the sessions.');


close cur_c1;

exception

when no_data_found then

dbms_output.put_line('Unable to find process id &&uxproc for the instance number ''&inst_id'' !!!');


return;

when others then

dbms_output.put_line(sqlerrm);

return;

END;

/

Kill session

alter system kill session 'SID,SERIAL#';

Pgina 2 de 2Oracle Application DBA Posts: Blocking sessions details

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blocking sessions details.pdf