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MariaDB High Performance

You're reading from   MariaDB High Performance Familiarize yourself with the MariaDB system and build high-performance applications

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Product type Paperback
Published in Sep 2014
Publisher
ISBN-13 9781783981601
Length 298 pages
Edition 1st Edition
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Author (1):
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Pierre Mavro Pierre Mavro
Author Profile Icon Pierre Mavro
Pierre Mavro
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Table of Contents (13) Chapters Close

Preface 1. Performance Introduction FREE CHAPTER 2. Performance Analysis 3. Performance Optimizations 4. MariaDB Replication 5. WAN Slave Architectures 6. Building a Dual Master Replication 7. MariaDB Multimaster Slaves 8. Galera Cluster – Multimaster Replication 9. Spider – Sharding Your Data 10. Monitoring 11. Backups Index

Profiling

Profiling permits you to benchmark information that indicates resource usages during a session. This is used when we want to get information on a specified query. Here are the types of information:

  • Block I/O
  • Context switches
  • CPU
  • IPC
  • Memory
  • Page faults
  • Source
  • Swaps
  • All

First of all, you need to know that profiling on a production server is not recommended because of the performance degradation it can cause.

To enable profiling, use the following command:

MariaDB [none]> SET PROFILING=1;

Perform all the query tasks you want to profile and then list them:

MariaDB [none]> SHOW PROFILES;
+----------+------------+-------------------------+
| Query_ID | Duration   | Query                   |
+----------+------------+-------------------------+
|        1 | 0.30798532 | select * from s_explain |
|        2 | 0.25341312 | select * from s_explain |
+----------+------------+-------------------------+

In the preceding command-line output, you can see that we've two query IDs. To get information...

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