What are the most likely causes of spikes in CPU usage to 99% for dbsrv10.exe, or more recent versions of dbsrv*.exe for that matter? Thanks in advance.

asked 12 Feb '14, 17:34

BetterOffTed's gravatar image

BetterOffTed
46224
accept rate: 0%

2

I really like this type of question: I have a great server, I want that the server is performing as fast as it can, but why the hell is the CPU used for this? Now frankly: A high peek performance can only be achieved if the CPU is used. So you have two possibilities, your software has a bug doing nonsense things with the CPU or what is more likely the software is doing its work and yes it will utilize the CPU.

I would be more concerned if a database software would not be able to bring a CPU to 100% usage.

(13 Feb '14, 03:17) Martin

Any query that either does lots of computations (e.g. stored procedure execution) or iterates over lots of rows that are already in cache (i.e. does not require any I/O ... or the I/O read-ahead can stay ahead of the executing query) will cause the CPU to 'spike' to 100%. I.e. the server will execute full-tilt until either it needs to wait for I/O, blocks on a lock, blocks on a 'WAIT FOR ...' or similar statement, hits a sync point (waiting for the client to fetch or rows), or completes.

permanent link

answered 12 Feb '14, 19:02

Mark%20Culp's gravatar image

Mark Culp
23.0k9129270
accept rate: 40%

Try running a monitor, either the SQL Anywhere Monitor which ships with version 11.0.1 and later but works on version 10 databases, or Foxhound which works on Version 5.5 through 12 databases. I recommend the latter :)...

Foxhound

permanent link

answered 13 Feb '14, 08:48

Breck%20Carter's gravatar image

Breck Carter
25.7k427586846
accept rate: 20%

Your answer
toggle preview

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here

By RSS:

Answers

Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text](http://url.com/ "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Question tags:

×9

question asked: 12 Feb '14, 17:34

question was seen: 2,446 times

last updated: 13 Feb '14, 08:48