High Disk I/O Problem

Question

Hello all
why every server have a capture Process have this problem "High Disk I/O" ???
in all configurations , transactions load (high or low) , number of connections (high or low)
i try to keep server without any transactions or any connections for 6 day and i still have this Problem
it seems a serious problem without fixing
release 10.2.0.1

Answer 1

hi rijesh
SEGMENT_NAME Size in MB SUM(BLOCKS)
LOGMNR_RESTART_CKPT$ .5 64
in Oracle Enterprise manager wait event is :
Wait event "Streams capture: waiting for archive log" in wait class "Other" was consuming significant database time.
i traced session that cause this wait event and generate tkprof file but i think there is nothing useful :
{color:#0000ff}TKPROF: Release 10.2.0.1.0 - Production on Mon Nov 17 16:08:35 2008
Copyright (c) 1982, 2005, Oracle. All rights reserved.
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{color:#0000ff}Trace file: C:\oracle\admin\test\bdump\test_p000_3740.trc
Sort options: prsdsk exedsk fchdsk
count = number of times OCI procedure was executed
cpu = cpu time in seconds executing
elapsed = elapsed time in seconds executing
disk = number of physical reads of buffers from disk
query = number of buffers gotten for consistent read
current = number of buffers gotten in current mode (usually for update)
rows = number of rows processed by the fetch or execute call
Trace file: C:\oracle\admin\test\bdump\test_p000_3740.trc
Trace file compatibility: 10.01.00
Sort options: prsdsk exedsk fchdsk
1 session in tracefile.
0 user SQL statements in trace file.
0 internal SQL statements in trace file.
0 SQL statements in trace file.
0 unique SQL statements in trace file.
10268 lines in trace file.
0 elapsed seconds in trace file.
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i tried to open trace file "test_p000_3740.trc" and i found this :
{color:#0000ff}Dump file c:\oracle\admin\test\bdump\test_p000_3740.trc
Mon Nov 17 14:52:21 2008
ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, Oracle Label Security, OLAP and Data Mining options
Windows Server 2003 Version V5.2 Service Pack 1
CPU : 4 - type 586, 1 Physical Cores
Process Affinity : 0x00000000
Memory (Avail/Total): Ph:2789M/4094M, Ph+PgF:4519M/5972M, VA:1627M/2047M
Instance name: test
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{color:#0000ff}Redo thread mounted by this instance: 1
Oracle process number: 29
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{color:#0000ff}Windows thread id: 3740, image: ORACLE.EXE (P000)
*** 2008-11-17 14:52:21.652
*** SERVICE NAME:(SYS$USERS) 2008-11-17 14:52:21.652
*** SESSION ID:(144.2) 2008-11-17 14:52:21.652
WAIT #0: nam='control file sequential read' ela= 234 file#=0 block#=1 blocks=1 obj#=-1 tim=3793171610
WAIT #0: nam='control file sequential read' ela= 294 file#=1 block#=1 blocks=1 obj#=-1 tim=3793186744
WAIT #0: nam='control file sequential read' ela= 208 file#=2 block#=1 blocks=1 obj#=-1 tim=3793187894
WAIT #0: nam='control file sequential read' ela= 182 file#=0 block#=16 blocks=1 obj#=-1 tim=3793188866
WAIT #0: nam='control file sequential read' ela= 233 file#=0 block#=18 blocks=1 obj#=-1 tim=3793189902
WAIT #0: nam='log file sequential read' ela= 12608 log#=0 block#=43745 blocks=8192 obj#=-1 tim=3793255308
WAIT #0: nam='log file sequential read' ela= 68218 log#=0 block#=43745 blocks=8192 obj#=-1 tim=3793363640
WAIT #0: nam='log file sequential read' ela= 100 log#=0 block#=1 blocks=1 obj#=-1 tim=3793518549
WAIT #0: nam='log file sequential read' ela= 89 log#=0 block#=1 blocks=1 obj#=-1 tim=3793541091
WAIT #0: nam='control file sequential read' ela= 14717 file#=0 block#=1 blocks=1 obj#=-1 tim=3793556425
WAIT #0: nam='control file sequential read' ela= 6630 file#=1 block#=1 blocks=1 obj#=-1 tim=3793563619
WAIT #0: nam='control file sequential read' ela= 9355 file#=2 block#=1 blocks=1 obj#=-1 tim=3793573635
WAIT #0: nam='control file sequential read' ela= 11426 file#=0 block#=16 blocks=1 obj#=-1 tim=3793585608
WAIT #0: nam='control file sequential read' ela= 201 file#=0 block#=18 blocks=1 obj#=-1 tim=3793586348
WAIT #0: nam='control file sequential read' ela= 190 file#=0 block#=1 blocks=1 obj#=-1 tim=3793587134
WAIT #0: nam='control file sequential read' ela= 186 file#=1 block#=1 blocks=1 obj#=-1 tim=3793587842
WAIT #0: nam='control file sequential read' ela= 185 file#=2 block#=1 blocks=1 obj#=-1 tim=3793588548
WAIT #0: nam='control file sequential read' ela= 187 file#=0 block#=16 blocks=1 obj#=-1 tim=3793589241
WAIT #0: nam='control file sequential read' ela= 185 file#=0 block#=18 blocks=1 obj#=-1 tim=3793589944
WAIT #0: nam='log file sequential read' ela= 72452 log#=0 block#=43745 blocks=8192 obj#=-1 tim=3793663620
WAIT #0: nam='log file sequential read' ela= 106739 log#=0 block#=43745 blocks=8192 obj#=-1 tim=3793771943
WAIT #0: nam='log file sequential read' ela= 95 log#=0 block#=1 blocks=1 obj#=-1 tim=3793908609
WAIT #0: nam='log file sequential read' ela= 111 log#=0 block#=1 blocks=1 obj#=-1 tim=3793925054
WAIT #0: nam='control file sequential read' ela= 22382 file#=0 block#=1 blocks=1 obj#=-1 tim=3793948070
WAIT #0: nam='control file sequential read' ela= 6591 file#=1 block#=1 blocks=1 obj#=-1 tim=3793955243
WAIT #0: nam='control file sequential read' ela= 9478 file#=2 block#=1 blocks=1 obj#=-1 tim=3793965270
WAIT #0: nam='control file sequential read' ela= 11449 file#=0 block#=16 blocks=1 obj#=-1 tim=3793977257
WAIT #0: nam='control file sequential read' ela= 203 file#=0 block#=18 blocks=1 obj#=-1 tim=3793977980
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any suggestions my friend
Best regards
Edited by: wassim haddad on Nov 17, 2008 5:47 AM