HP-UX

From: Alfonso León <aleon68_at_gmail.com>
Date: Mon, 14 Aug 2006 14:28:08 -0500
Message-ID: <83a585ac0608141228u37a79801xd6cfc84bbee5fd19@mail.gmail.com>

Hi Every one:
we went online today with full load, until last week we were 20% loaded, and CPU Utilization with less 10%. We have a HPUX with 10 cpus and a Hitachi SAN. Oracle 9.2.0.6. CPU utilization is now 40%.

Today the performance was way more less than expected.

these are the top wait event

Top 5 Timed Events

~~~~~~~~~~~~~~~~~~ % Total

Event Waits Time (s) Ela Time

• ------------ -----------

  ---

db file sequential read                      1,768,294       38,259

39.69

log file sync                                    71,190      30,065

31.19

free buffer waits                                12,212      11,351

11.78

buffer busy waits                               360,596       8,773

9.10

CPU time                                                      2,736

2.84

db file scattered read                          382,133       1,691

1.75

db file parallel read                             2,958       1,199

1.24

log file parallel write                           5,193       1,073

1.11

enqueue                                           1,649         698

.72

SQL*Net message from dblink                      54,991         141

.15

As you can see i'm waiting on disk, the path utilization of the san is less than 20% and the CPU utilization is less than 40%. almost all the processes are sleeping.

On the HP-UX monitor says that peak disk utilization is 100% the rest of the parameters are normal and sub-used.

Does anybody know if there is parameter in kernel that limit the disk request?

Any idea would be appreciated.

Alfonso Leon

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Received on Mon Aug 14 2006 - 14:28:08 CDT