Regarding deadlock

Question

Hi,
How I can detect if a deadlock occured in my database and what are the sessions that creating the deadlock.
How I can find top sqls' running in my database?
Thanks,
Koushik

Answer 1

Hi,
Thanks for reply.
I have a trace file from /udump and I have applies TKPROF on it to make the file readable format. Here is few lines from it given below :
select '"'||name||'" '||decode(type#,1,decode(charsetform,2,
'NVARCHAR2('||decode(bitand(property,8388608),8388608,decode(spare3,0,1,
spare3)||')','BYTECOUNT=>'||decode(length,0,1,length)||')'),
'VARCHAR2('||decode(bitand(property,8388608),8388608,decode(spare3,0,1,
spare3)||' char)',decode(length,0,1,length)||' byte)')),2,decode(scale,null,
decode(precision#,null,'NUMBER','FLOAT('||precision#||')'),
'NUMBER('||decode(precision#,null,'38', precision#)||','||scale||')'),8,
'LONG',9,'VARCHAR('||(decode(length,0,1,length))||')',12,'DATE',23,
'RAW('||length||')',24,'LONG RAW',69,'ROWID',96,decode(charsetform,2,
'NCHAR('||decode(bitand(property,8388608),8388608,decode(spare3,0,1,spare3)
||')','BYTECOUNT=>'||decode(length,0,1,length)||')'),
'CHAR('||decode(bitand(property,8388608),8388608,decode(spare3,0,1,spare3)
||' char)',decode(length,0,1,length)||' byte)')),97,
'VARCHAR('||(decode(length,0,1,length))|| ')',105,'MLSLABEL',106,'MLSLABEL',
112,decode(charsetform,2,'NCLOB','CLOB'),113,'BLOB',114,'BFILE',115,
decode(charsetform,2,'NCFILE','CFILE'),178,'TIME('||scale||')',179,
'TIME('||scale||') WITH TIME ZONE',180,'TIMESTAMP('||scale||')',181,
'TIMESTAMP('||scale||') WITH TIME ZONE',231,'TIMESTAMP('||scale||') WITH
LOCAL TIME ZONE',182,'INTERVAL YEAR('||NVL(precision#, 0)||') TO MONTH',183,
'INTERVAL DAY('||NVL(precision#, 0)||') TO SECOND('||scale||')',208,
'UROWID('||spare1||')',100,'BINARY_FLOAT',101,'BINARY_DOUBLE','UNDEFINED')
||decode(null$,0,'',' NOT NULL')||decode(bitand(property, 32), 0, ',', '
HIDDEN,'),name, type#, intcol#, null$, bitand(property, 32)
from
col$ where obj#=:1 and (bitand(property,32) = 0 or bitand(property, 4194304)
<> 0) order by col#
call count cpu elapsed disk query current rows
Parse 6 0.00 0.00 0 0 0 0
Execute 6 0.00 0.00 0 0 0 0
Fetch 109 0.00 0.00 0 21 0 103
total 121 0.00 0.00 0 21 0 103
Misses in library cache during parse: 1
Misses in library cache during execute: 1
Optimizer goal: CHOOSE
Parsing user id: SYS (recursive depth: 1)
Rows Row Source Operation
10 SORT ORDER BY (cr=3 pr=0 pw=0 time=143 us)
10 TABLE ACCESS CLUSTER COL$ (cr=3 pr=0 pw=0 time=61 us)
1 INDEX UNIQUE SCAN I_OBJ# (cr=2 pr=0 pw=0 time=12 us)(object id 3)
Elapsed times include waiting on following events:
Event waited on Times Max. Wait Total Waited
---------------------------------------- Waited ---------- ------------
row cache lock 1 0.00 0.00
Can you please explain the above lines.
Thanks,
Koushik