bdperf

scripts>bdperf

 

— .: Script to find Oracle database performance

— This single script provides the overall picture of the database
— in terms of Waits events, Active/Inactive killed sessions, Top
— Processes (physical I/O, logical I/O, memory and CPU processes),
— Top CPU usage by users, etc.

set serveroutput on
declare
cursor c1 is select version
from v$instance;
cursor c2 is
select
host_name
, instance_name
, to_char(sysdate, ‘HH24:MI:SS DD-MON-YY’) currtime
, to_char(startup_time, ‘HH24:MI:SS DD-MON-YY’) starttime
from v$instance;
cursor c4 is
select * from (SELECT count(*) cnt, substr(event,1,50) event
FROM v$session_wait
WHERE wait_time = 0
AND event NOT IN (‘smon timer’,’pipe get’,’wakeup time manager’,’pmon timer’,’rdbms ipc message’,
‘SQL*Net message from client’)
GROUP BY event
ORDER BY 1 DESC) where rownum <6;
cursor c5 is
select round(sum(value)/1048576) as sgasize from v$sga;
cursor c6 is select round(sum(bytes)/1048576) as dbsize
from v$datafile;
cursor c7 is select ‘top physical i/o process’ category, sid,
username, total_user_io amt_used,
round(100 * total_user_io/total_io,2) pct_used
from (select b.sid sid, nvl(b.username, p.name) username,
sum(value) total_user_io
from v$statname c, v$sesstat a,
v$session b, v$bgprocess p
where a.statistic# = c.statistic#
and p.paddr (+) = b.paddr
and b.sid = a.sid
and c.name in (‘physical reads’, ‘physical writes’,
‘physical reads direct’,
‘physical reads direct (lob)’,
‘physical writes direct’,
‘physical writes direct (lob)’)
and b.username not in (‘SYS’, ‘SYSTEM’, ‘SYSMAN’, ‘DBSNMP’)
group by b.sid, nvl(b.username, p.name)
order by 3 desc),
(select sum(value) total_io
from v$statname c, v$sesstat a
where a.statistic# = c.statistic#
and c.name in (‘physical reads’, ‘physical writes’,
‘physical reads direct’,
‘physical reads direct (lob)’,
‘physical writes direct’,
‘physical writes direct (lob)’))
where rownum < 2
union all
select ‘top logical i/o process’, sid, username,
total_user_io amt_used,
round(100 * total_user_io/total_io,2) pct_used
from (select b.sid sid, nvl(b.username, p.name) username,
sum(value) total_user_io
from v$statname c, v$sesstat a,
v$session b, v$bgprocess p
where a.statistic# = c.statistic#
and p.paddr (+) = b.paddr
and b.sid = a.sid
and c.name in (‘consistent gets’, ‘db block gets’)
and b.username not in (‘SYS’, ‘SYSTEM’, ‘SYSMAN’, ‘DBSNMP’)
group by b.sid, nvl(b.username, p.name)
order by 3 desc),
(select sum(value) total_io
from v$statname c, v$sesstat a,
v$session b, v$bgprocess p
where a.statistic# = c.statistic#
and p.paddr (+) = b.paddr
and b.sid = a.sid
and c.name in (‘consistent gets’, ‘db block gets’))
where rownum < 2
union all
select ‘top memory process’, sid,
username, total_user_mem,
round(100 * total_user_mem/total_mem,2)
from (select b.sid sid, nvl(b.username, p.name) username,
sum(value) total_user_mem
from v$statname c, v$sesstat a,
v$session b, v$bgprocess p
where a.statistic# = c.statistic#
and p.paddr (+) = b.paddr
and b.sid = a.sid
and c.name in (‘session pga memory’, ‘session uga memory’)
and b.username not in (‘SYS’, ‘SYSTEM’, ‘SYSMAN’, ‘DBSNMP’)
group by b.sid, nvl(b.username, p.name)
order by 3 desc),
(select sum(value) total_mem
from v$statname c, v$sesstat a
where a.statistic# = c.statistic#
and c.name in (‘session pga memory’, ‘session uga memory’))
where rownum < 2
union all
select ‘top cpu process’, sid, username,
total_user_cpu,
round(100 * total_user_cpu/greatest(total_cpu,1),2)
from (select b.sid sid, nvl(b.username, p.name) username,
sum(value) total_user_cpu
from v$statname c, v$sesstat a,
v$session b, v$bgprocess p
where a.statistic# = c.statistic#
and p.paddr (+) = b.paddr
and b.sid = a.sid
and c.name = ‘CPU used by this session’
and b.username not in (‘SYS’, ‘SYSTEM’, ‘SYSMAN’, ‘DBSNMP’)
group by b.sid, nvl(b.username, p.name)
order by 3 desc),
(select sum(value) total_cpu
from v$statname c, v$sesstat a,
v$session b, v$bgprocess p
where a.statistic# = c.statistic#
and p.paddr (+) = b.paddr
and b.sid = a.sid
and c.name = ‘CPU used by this session’)
where rownum < 2;
cursor c8 is select username, sum(VALUE/100) cpu_usage_sec
from v$session ss, v$sesstat se, v$statname sn
where se.statistic# = sn.statistic#
and name like ‘%CPU used by this session%’
and se.sid = ss.sid
and username is not null
and username not in (‘SYS’, ‘SYSTEM’, ‘SYSMAN’, ‘DBSNMP’)
group by username
order by 2 desc;
begin
dbms_output.put_line (‘Database Version’);
dbms_output.put_line (‘—————–‘);
for rec in c1
loop
dbms_output.put_line(rec.version);
end loop;
dbms_output.put_line( chr(13) );
dbms_output.put_line(‘Hostname’);
dbms_output.put_line (‘———-‘);
for rec in c2
loop
dbms_output.put_line(rec.host_name);
end loop;
dbms_output.put_line( chr(13) );
dbms_output.put_line(‘SGA Size (MB)’);
dbms_output.put_line (‘————-‘);
for rec in c5
loop
dbms_output.put_line(rec.sgasize);
end loop;
dbms_output.put_line( chr(13) );
dbms_output.put_line(‘Database Size (MB)’);
dbms_output.put_line (‘—————–‘);
for rec in c6
loop
dbms_output.put_line(rec.dbsize);
end loop;
dbms_output.put_line( chr(13) );
dbms_output.put_line(‘Instance start-up time’);
dbms_output.put_line (‘———————–‘);
for rec in c2 loop
dbms_output.put_line( rec.starttime );
end loop;
dbms_output.put_line( chr(13) );
for b in
(select total, active, inactive, system, killed
from
(select count(*) total from v$session)
, (select count(*) system from v$session where username is null)
, (select count(*) active from v$session where status = ‘ACTIVE’ and username is not null)
, (select count(*) inactive from v$session where status = ‘INACTIVE’)
, (select count(*) killed from v$session where status = ‘KILLED’)) loop
dbms_output.put_line(‘Active Sessions’);
dbms_output.put_line (‘—————‘);
dbms_output.put_line(b.total || ‘ sessions: ‘ || b.inactive || ‘ inactive,’ || b.active || ‘ active, ‘ || b.system || ‘ system, ‘ || b.killed || ‘ killed ‘);
end loop;
dbms_output.put_line( chr(13) );
dbms_output.put_line( ‘Sessions Waiting’ );
dbms_output.put_line( chr(13) );
dbms_output.put_line(‘Count Event Name’);
dbms_output.put_line(‘—– —————————————————–‘);
for rec in c4
loop
dbms_output.put_line(rec.cnt||’ ‘||rec.event);
end loop;
dbms_output.put_line( chr(13) );
dbms_output.put_line(‘—– —————————————————–‘);
dbms_output.put_line(‘TOP Physical i/o, logical i/o, memory and CPU processes’);
dbms_output.put_line (‘—————‘);
for rec in c7
loop
dbms_output.put_line (rec.category||’: SID ‘||rec.sid||’ User : ‘||rec.username||’: Amount used : ‘||rec.amt_used||’: Percent used: ‘||rec.pct_used);
end loop;
dbms_output.put_line(‘——————————————————————‘);
dbms_output.put_line(‘TOP CPU users by usage’);
dbms_output.put_line (‘—————‘);
for rec in c8
loop
dbms_output.put_line (rec.username||’–‘||rec.cpu_usage_sec);
dbms_output.put_line (‘—————‘);
end loop;
end;
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