Performance Problem.
- From: "Zanen van, J (Jacob)" <Jacob.van.Zanen@xxxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 31 Oct 2007 14:00:57 +1100
Need some help on this.
We have a peoplesoft environment here that seems to have performance
issues every so often.
When this happens performance comes to s standstill for everyone and a
SQL*Plus query that takes about 6-7 seconds normally takes about 13
minutes. During this time it will pretty much wait for sequential reads
only.
I have not yet had the chance to install statspack yet and we are not
licensed for AWR.
We are on oracle 10.2.0.3 on solaris 64bit
When I check the database quickly (needs to be done quickly as business
dictates a reboot at the moment) I do not see any obvious reasons why
this would be happening.
On unix the admins see quite a large increase in use of semaphores.
After the reboot the problems seem to disappear for several weeks/months
Has anyone seen something similar before and found out why this is
happening.
Brgds
Jack
00:00:00 msg/s sema/s
00:05:00 15.19 17.37
00:05:00 16.03 19.85
00:10:00 15.30 16.88
00:15:00 15.20 16.74
00:20:00 15.28 16.33
00:25:00 15.18 16.69
00:30:00 15.29 16.64
00:35:00 15.20 16.77
00:40:00 15.29 16.50
00:45:00 15.20 16.38
00:50:00 15.29 16.85
00:55:00 15.20 16.10
01:00:00 15.29 16.38
01:05:00 15.98 18.36
01:10:00 15.27 17.00
01:15:00 15.20 16.11
01:20:00 15.30 16.87
01:25:00 15.21 16.78
01:30:00 15.28 16.39
01:35:00 15.21 16.62
01:40:00 15.24 16.37
01:45:00 15.25 16.69
01:50:00 15.22 16.46
01:55:00 15.25 16.48
02:00:00 15.26 16.77
02:05:00 15.24 24.18
02:10:00 15.23 17.22
02:15:00 15.25 16.10
02:20:01 15.21 16.84
02:25:00 18.13 38.54
02:30:00 15.41 5314.39
02:35:00 14.98 8429.98
02:40:00 15.65 3357.07
02:45:00 15.31 2490.93
02:50:00 15.65 3482.85
02:55:00 15.73 148.26
03:00:00 15.08 171.86
03:05:00 15.21 183.91
03:10:00 14.92 294.01
03:15:00 15.00 468.95
03:20:00 14.93 520.64
03:25:00 15.01 412.20
03:30:00 14.92 447.94
03:35:00 15.00 424.45
03:40:00 14.94 431.55
03:45:00 15.01 456.17
03:50:01 14.93 411.22
03:55:00 15.00 391.96
04:00:00 14.92 394.48
04:05:00 15.00 498.71
04:10:00 14.94 570.89
04:15:00 15.00 522.34
04:20:00 15.74 400.65
04:25:00 15.34 428.68
04:30:00 14.96 430.52
04:35:00 14.97 472.91
04:40:00 16.23 254.53
04:45:00 15.47 198.73
04:50:00 15.53 198.35
04:55:00 15.99 190.24
05:00:00 16.42 209.91
05:05:00 16.22 174.31
05:10:00 15.94 140.37
05:15:00 15.52 106.79
05:20:00 15.51 329.76
05:25:00 15.90 303.13
05:30:00 15.40 534.14
05:35:00 16.42 577.82
05:40:00 17.19 584.08
05:45:00 15.01 48.89
05:50:00 15.71 69.60
05:55:00 14.93 68.07
06:00:00 15.15 68.18
06:05:00 14.94 70.65
06:05:00 14.17 20.47
06:10:00 15.01 16.73
06:15:00 14.92 16.64
06:20:00 15.00 18.19
06:25:00 15.07 17.92
06:30:00 15.02 47.48
06:35:00 14.92 77.07
06:40:01 15.75 86.36
06:45:00 15.81 42.92
06:50:00 15.44 61.03
06:55:00 16.15 35.05
07:00:00 16.73 98.17
07:05:00 15.13 36.37
07:10:00 15.27 34.78
07:15:00 15.10 221.79
07:20:00 14.99 134.22
07:25:00 15.18 5043.76
07:30:00 15.41 61.87
07:35:01 16.78 68.32
07:40:00 15.76 77.19
07:45:00 15.25 35.46
07:50:00 15.21 27.88
07:55:01 15.26 21.13
08:00:00 15.27 16.33
08:05:00 15.24 16.91
08:10:01 15.99 17.44
08:15:00 15.55 16.72
08:20:00 15.51 16.90
08:25:00 15.53 17.25
08:30:00 15.46 16.53
08:35:00 15.99 17.27
08:40:00 15.35 17.08
08:45:00 17.14 17.50
08:50:01 15.98 19.26
08:55:00 15.50 22.11
09:00:00 16.13 23.00
09:05:00 17.20 26.45
09:10:00 15.00 162.57
09:15:00 16.40 152.22
09:20:00 15.85 637.20
09:25:00 13.10 25387.19
09:30:00 15.77 5485.02
09:35:00 16.88 4685.59
09:40:00 18.28 4743.99
09:45:00 15.72 470.47
09:50:01 16.72 493.55
09:55:00 15.61 646.27
10:00:00 16.61 590.49
10:05:00 16.63 1078.74
10:10:00 16.98 2303.44 -----> stop/start Psoft/Ost and oracle from 10:15
- 10:27am <---- semaphore back to normal rates.
10:15:00 15.82 17.97
10:20:00 9.27 16.40
10:25:01 3.43 8.64
10:30:00 17.49 17.85
10:35:00 17.52 17.81
10:40:00 16.38 18.27
10:45:01 15.21 17.25
10:50:00 16.32 17.78
10:55:00 15.42 17.84
11:00:00 16.84 18.47
11:05:00 17.00 18.27
______________________________________________________________
This email, including any attachments, may be confidential or privileged, and
is sent for the personal attention of the intended recipient. If you have
received this email in error, please delete it immediately. The views
expressed are not necessarily those of the Rabobank Group. The Group is not
liable for the effects of any virus which may be contained in this email.
If this email contains marketing material and you do not wish to receive such
material by email in future, please reply to this email and place the words
"Remove My Details - Electronic Messages" in the Subject Header.
The Rabobank Group
Australia: 1800 025 484
New Zealand: 0800 500 933
______________________________________________________________
Other related posts:
