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Database Session Stats

August 18, 2011 Leave a comment

Session

1. Connected users list

set lines 100 pages 999
col ID format a15
select username
,      sid || ',' || serial# "ID"
,      status
,      last_call_et "Last Activity"
from   v$session
where  username is not null
order by status desc
,        last_call_et desc
/

2. Time since last user activity

set lines 100 pages 999
select username
,      floor(last_call_et / 60) "Minutes"
,      status
from   v$session
where  username is not null
order by last_call_et
/

3. Sessions sorted by logon time

set lines 100 pages 999
col ID		format a15
col osuser	format a15
col login_time	format a14
select 	username
,	osuser
,	sid || ',' || serial# "ID"
,	status
,	to_char(logon_time, 'hh24:mi dd/mm/yy') login_time
,	last_call_et
from	v$session
where	username is not null
order	by login_time
/

4.User information including OS process ID

col "SID/SERIAL" format a10
col username format a15
col osuser format a15
col program format a40
select	s.sid || ',' || s.serial# "SID/SERIAL"
,	s.username
,	s.osuser
,	p.spid "OS PID"
,	s.program
from	v$session s
,	v$process p
Where	s.paddr = p.addr
order 	by to_number(p.spid)
/

5. Show users’ current SQL

Select sql_text
from   v$sqlarea
where  (address, hash_value) in
(select sql_address, sql_hash_value
        from v$session
        where username like '&username')
/

6. Session status associated with the specified OS process ID

select	s.username
,	s.sid
,	s.serial#
,	p.spid
,	last_call_et
,	status
from 	V$SESSION s
,	V$PROCESS p
where	s.PADDR = p.ADDR
and	p.spid='&pid'
/

7. Show all active SQL

set feedback off
set serveroutput on size 9999
column username format a20
column sql_text format a55 word_wrapped
begin
  for x in
   (select username||'('||sid||','||serial#||') ospid = '|| process ||
    ' program = ' || program username,
    to_char(LOGON_TIME,' Day HH24:MI') logon_time,
    to_char(sysdate,' Day HH24:MI') current_time,
    sql_address,
    sql_hash_value
   from v$session
   where status = 'ACTIVE'
   and rawtohex(sql_address) <> '00'
   and username is not null ) loop
   for y in (select sql_text
   from v$sqlarea
   where address = x.sql_address ) loop
   if ( y.sql_text not like '%listener.get_cmd%' and
    y.sql_text not like '%RAWTOHEX(SQL_ADDRESS)%' ) then
    dbms_output.put_line( '--------------------' );
    dbms_output.put_line( x.username );
    dbms_output.put_line( x.logon_time || ' ' || x.current_time ||
 ' SQL#=' || x.sql_hash_value);
    dbms_output.put_line( substr( y.sql_text, 1, 250 ) );
   end if;
  end loop;
 end loop;
end;
/

8. List long operations

set lines 100 pages 999
col username format a15
col message format a40
col remaining format 9999
select	username
,	to_char(start_time, 'hh24:mi:ss dd/mm/yy') started
,	time_remaining remaining
,	message
from	v$session_longops
where	time_remaining = 0
order by time_remaining desc
/

9.  List open cursors per user

a, 
set pages 999
select 	sess.username
,	sess.sid
,	sess.serial#
,	stat.value cursors
from	v$sesstat stat
,	v$statname sn
,	v$session sess
where	sess.username is not null
and	sess.sid = stat.sid
and	stat.statistic# = sn.statistic#
and	sn.name = 'opened cursors current'
order by value
/
b,
set lines 100 pages 999
select count(hash_value) cursors
,      sid
,      user_name
from   v$open_cursor
group by
       sid
,      user_name
order by
       cursors
/
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