Also the Buffer Gets and Physical Reads seem normal to me. PL/SQL block is non-recrucive. It is called "asktom". Verify experience! http://juicecoms.com/cpu-usage/how-can-find-db-cpu-utilization-through-query-oracle.html
but, if you snapshot, wait, snapshot and then find out you have 1.1 cpu seconds and the wait was say 2 seconds long, you know you were 50% on cpu for Followup February 08, 2003 - 9:04 am UTC transaction throughput. I do not want to execute these SQL's when already the Oracle server is under heavy load due to some other operations. Sounds to me like you need that 20% buffer zone if you are not comfortable with your system or worse don't understand what it is doing at various stages of it's
In case v$sys_time_model and v$sysstat have different source of information, AWR is not bound to the figures of the later when reporting Top 5 Timed Events. aha... So what? Sean Followup May 29, 2003 - 7:36 am UTC there is no such thing as a "typical system" but anyway, assuming they are not screaming "it is slow", this is somewhat
For example, if you insert a row into a table that does not have enough space to hold that row, Oracle makes recursive calls to allocate the space dynamically. I also like using cpu quotas like with profiles and resource manager. For reading we are using bulk collect with fetch 1000 and for insert we are using forall loop...This is 10g on Win2k with 2 cpu hyper-threading machine (looks 4 cpu) Now Oracle Cpu Usage By Session I was really just curious about the what took up th etime in my process.
February 04, 2003 - 9:34 pm UTC Reviewer: Mike from TX " Are you at 100% utilization? Once -- I remember -- we had a memory leak in a snmp process and it began consuming cpu and memory. Blogroll Kevin Closson’s Oracle Blog Mike R’s Blog Oracle Internals Oracle Scratchpad Top Posts BLOB write size and CPU Blog Stats 111,430 hits %d bloggers like this: Bad Request The request i thought about this See http://asktom.oracle.com/pls/asktom/f?p=100:11:::::P11_QUESTION_ID:359617936136
but again -- you are taking the wrong approach.
If not, you haven't accomplished your job yet." I was going through the paper on 'Performance Management - Myths and Facts' by Cary Millsap where he goes on to explain that, Oracle High Cpu Usage Query Subtract this value from CPU used by this session to determine how much CPU time was used by the user calls. The LIO=6,938 and PIO=1,500,624. Having "spare" cpu buys you nothing.
A runaway is a runaway -- it only takes one to completely overpower a CPU. http://grokbase.com/t/freelists.org/oracle-l/04788sd36r/high-recursive-cpu-usage Consider example belov. Oracle Cpu Utilization Query For the purpose of the following discussion let me add the following statistics definitions taken from Statistics Descriptions that can be viewed either in Statspack or AWR report or directly using v$sysstat view: "CPU used How To Check Cpu Utilization In Oracle 11g Using LIO to find the session which uses a lot of cpu .
Oracle MOSC documents also remind us that, "Service Time is comprised of time spent on the CPU for Parsing, Recursive CPU usage (for PLSQL and recursive SQL) and CPU used for http://juicecoms.com/cpu-usage/how-to-find-cpu-utilization-in-sql-server.html They want me to find the problems as well as to give the recommendations for the 100X more active users. top sql report. Use it or lose it. How To Check Cpu Usage In Oracle Database
if you peak at 90% from time to time that is ok. " Now ..is the second reply not contradicting the first one? Thanx!! Can you use it else where? navigate here Not too many, not too little -- just enough.
Thanks so much for your help. Oracle Cpu Usage History This would seem just a reporting "feature", if not for the information from the further sections. I have the queries, I don't have the plans.
Is that a bad thing? February 05, 2003 - 9:24 am UTC Reviewer: Mike from TX Tom, Thanks. August 11, 2004 - 12:54 pm UTC Reviewer: A reader Hi Tom, Hope you are not too tired by answering all our queries ;) Well our system was using 100% CPU Oracle High Cpu Usage Windows Does it most likely waiting for the I/O causing the low CPU utilization?
The mere presence of high CPU usage numbers means nothing in and itself. What can be the reason for high value of "recursive cpu usage"? Followup July 06, 2004 - 7:43 am UTC read about statspack and start using it. his comment is here Thanks alot Followup February 09, 2003 - 6:45 pm UTC ok, executes / second then.
Thank you again July 06, 2004 - 1:07 pm UTC Reviewer: GJ from UK I was looking at our systems today and starting to worry that 98% CPU usage was bad, Also we are doing commit after every 1000 rows. Followup May 29, 2003 - 10:32 am UTC and N times the disk storage needs. In other words, your inserts are probably doing dynamic space allocation. --=20 Mladen Gogala Oracle DBA Wang Trading LLC Tel: (203) 956-6826 Note: This message is for the named person's use
AWR: SQL ordered by Elapsed Time Elapsed CPU Elap per % Total Time (s) Time (s) Executions Exec (s) DB Time SQL Id ---------- ---------- ------------ ---------- ------- ------------- In other words, your inserts are probably doing dynamic space allocation. -- Mladen Gogala Oracle DBA Wang Trading LLC Tel: (203) 956-6826 Note: This message is for the named person's use it would be unusual for this to happen on "normal old inserts" More info....Insert Scripts...Query November 23, 2004 - 7:20 pm UTC Reviewer: Prashant from San Jose, CA Hi Tom, Below It could depend on the type of workload February 06, 2003 - 12:55 am UTC Reviewer: Ramakrishna from India Dear Tom, You have said: "Are you at 100% utilization?
November 06, 2004 - 8:14 pm UTC Reviewer: Sean from NJ, USA Hi Tom, How can I quickly find the session which currently uses high percent of cpu for a long Do your oltp users do lots of cpu intensive things or not. as for reducing redo o insert append into unindexed tables and build indexes after the fact (parallel, nologging) o if in archivelog mode, and it is OK with your DBA, put Wang Trading LLC and any of its subsidiaries each reserve the right to monitor all e-mail communications through its networks.Any views expressed in this message are those of the individual sender,
In other words, your inserts are probably doingdynamic space allocation.--Mladen GogalaOracle DBAWang Trading LLCTel: (203) 956-6826Note:This message is for the named person's use only.