Home |  MySQL Buzz |  FAQ |  Feeds |  Submit your blog feed |  Feedback |  Archive |  Aggregate feed RSS 2.0 English Deutsch Español Français Italiano 日本語 Русский Português 中文
Showing entries 1 to 2

Displaying posts with tag: diagnostics (reset)

Today’s practical use-case for Performance Schema
Employee +2 Vote Up -0Vote Down

Today’s blog post starts with a question:

“In my continuous integration environment, running tests currently takes 30 minutes. I
believe that a large percentage of time is spent in MySQL, and I want to know if putting MySQL
on tmpfs will cut that time down?”.

I have previously written about how to configure MySQL to be less durable in testing environments, but today I wanted to write about how we can really test the assumption that the question is based around. That is to say:

  • We know that total time is 30 minutes.
  • We assume MySQL is a large percentage of this.
  • We know that this optimization will potentially allow us to avoid IO.
  • We then want to know what


  [Read more...]
The MySQL error log in MySQL 5.7
Employee +0 Vote Up -0Vote Down

The MySQL error log has received some attention in MySQL 5.7, with a new setting called log_error_verbosity.

There are three possible values, as documented in the manual:

Verbosity Value Message Types Logged 1 Errors only 2 Errors and warnings 3 Errors, warnings, and notes (default)

As Giuseppe has written about previously, writing notes or “informational events” can create debugging problems because they reduce the signal to noise ratio. There is now an easy way to reduce the logging to be only warnings and errors!

Showing entries 1 to 2

Planet MySQL © 1995, 2014, Oracle Corporation and/or its affiliates   Legal Policies | Your Privacy Rights | Terms of Use

Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.