Oracle checks the lock table and handles the lock table
/
locked
*query locked object and analyse reason,kill it
*/
select 'alter system kill session ''' || SID || ',' || SERIAL# || ''';'
from (select distinct a.sid,
a.Serial#,
status,
machine,
LOCKWAIT,
logon_time
from v$session a, v$locked_object b
where (a.status = 'ACTIVE' or a.status = 'INACTIVE')
and a.sid = b.session_id
and b.ORACLE_USERNAME = 'XYHISTEST' --Add username to filter user resources
);
/2. Batch execute the statements generated in the first step
alter system kill session 'sid,serial#';
alter system kill session '6976,33967';/
/3. Query oracle user name, machine name, lock table object/
SELECT l.session_id sid,
s.serial#,
l.locked_mode,
l.oracle_username,
l.os_user_name,
s.machine,
s.terminal,
o.object_name,
s.logon_time
FROM v$locked_object l, all_objects o, v$session s
WHERE l.object_id = o.object_id
AND l.session_id = s.sid
ORDER BY sid, s.serial#;
/3. Or/
select s.SID, s.OSUSER, p.spid as OSPID, s.MACHINE, s.TERMINAL, s.PROGRAM
from v$session s, v$process p
where s.sid = 6 --session_id
and s.paddr = p.addr;
/4. Query is what sql statement is executed to lock the table/
select b.sql_text
from v$session a, v$sql b
where a.sid = 6 --session_id
and a.SQL_ADDRESS = b.ADDRESS(+);
select sql_text
from v$session a, v$sqltext_with_newlines b
where DECODE(a.sql_hash_value, 0, prev_hash_value, sql_hash_value) =
b.hash_value
and a.sid = #149
order by piece;
/5. Query is what sql statement is executed to lock the table/
SELECT l.session_id sid,
s.serial#,
l.locked_mode,
l.oracle_username,
s.user#,
l.os_user_name,
s.machine,
s.terminal,
a.sql_text,
a.action
FROM v$sqlarea a, v$session s, v$locked_object l
WHERE l.session_id = s.sid
AND s.prev_sql_addr = a.address
ORDER BY sid, s.serial#;
/6. Check whether there is SQL for locking tables/
select 'blocker(' || lb.sid || ':' || sb.username || ')_sql:' ||
qb.sql_text blockers,
'waiter (' || lw.sid || ':' || sw.username || ')_sql:' ||
qw.sql_text waiters
from v$lock lb, v$lock lw, v$session sb, v$session sw, v$sql qb, v$sql qw
where lb.sid = sb.sid
and lw.sid = sw.sid
and sb.prev_sql_addr = qb.address
and sw.sql_address = qw.address
and lb.id1 = lw.id1
and sw.lockwait is not null
and sb.lockwait is null
and lb.block = 1;
