Monitoring MySQL with OpenTSDB

Monitoring MySQL with OpenTSDB
Percona live 2013 Geoffrey Anderson, Box Inc.
@geodbz

Who
Geoffrey Anderson
• Database Operations Engineer @ Box, Inc.
• a.k.a. DBA
• Tooling for MySQL and HBase
• #DBHangOps

OpenTSDB is...
• Distributed
• Scalable
• Time Series Database
• Runs on HBase
• Created By
Benoit Sigoure
HBase
TSD for
Querying
mydb.example.com
HAProxy
fe1.example.com
TSD for
Storing
Push
Metrics
Query via API

• FAST
• EASY to Scale
• EASY to Populate
• EASY to collect data
• EASY to Query
Why OpenTSDB?

#!/usr/bin/env bash
timestamp=$(date +%s)
mysql -ss -e "SHOW GLOBAL STATUS" | while read var val
do
echo "mysql.$var $timestamp $val host=$HOSTNAME"
done
ganderson@mydb.example.com:~$ _./mysql_collector.sh
mysql.Aborted_connects 1366399993 0 host=mydb.example.com
mysql.Binlog_cache_disk_use 1366399993 0 host=mydb.example.com
mysql.Binlog_cache_use 1366399993 0 host=mydb.example.com
mysql.Binlog_stmt_cache_disk_use 1366399993 0 host=mydb.example.com
mysql.Binlog_stmt_cache_use 1366399993 0 host=mydb.example.com
mysql.Bytes_received 1366399993 19453687 host=mydb.example.com
mysql.Bytes_sent 1366399993 1238166682 host=mydb.example.com
mysql.Com_admin_commands 1366399993 1 host=mydb.example.com
mysql.Com_assign_to_keycache 1366399993 0 host=mydb.example.com
...
Example: mysql_collector.sh

#!/usr/bin/env bash
timestamp=$(date +%s)
mysql -ss -e "SHOW GLOBAL STATUS" | while read var val
do
echo "mysql.$var $timestamp $val host=$HOSTNAME"
done
ganderson@mydb.example.com:~$ _./mysql_collector.sh
mysql.Aborted_connects 1366399993 0 host=mydb.example.com
mysql.Binlog_cache_disk_use 1366399993 0 host=mydb.example.com
mysql.Binlog_cache_use 1366399993 0 host=mydb.example.com
mysql.Binlog_stmt_cache_disk_use 1366399993 0 host=mydb.example.com
mysql.Binlog_stmt_cache_use 1366399993 0 host=mydb.example.com
mysql.Bytes_received 1366399993 19453687 host=mydb.example.com
mysql.Bytes_sent 1366399993 1238166682 host=mydb.example.com
mysql.Com_admin_commands 1366399993 1 host=mydb.example.com
mysql.Com_assign_to_keycache 1366399993 0 host=mydb.example.com
...
Example: mysql_collector.sh
Metric name Timestamp Value “Tags” (key=val)

* * * * * mysql_collector.sh | nc opentsdb.example.com 4242
Example: adding a cron for OpenTSDB

http://opentsdb.example.com
/#start=2013/04/10-07:32:29
&end=2013/04/10-07:57:57
&m=sum:proc.stat.cpu.percentage_idle{host=db22}
&o=axis x1y1
&m=sum:db.threads_running{host=db22}
&o=axis x1y2
&ylabel=CPU idle
&y2label=Threads Running
&yrange=[0:]
&wxh=1475x600
&png

http://opentsdb.example.com
/q?start=2013/04/10-07:32:29
&end=2013/04/10-07:57:57
&m=sum:proc.stat.cpu.percentage_idle{host=db22}
&o=axis x1y1
&m=sum:db.threads_running{host=db22}
&o=axis x1y2
&ylabel=CPU idle
&y2label=Threads Running
&yrange=[0:]
&ascii

Table Info from I_S
SELECT *, DATA_LENGTH+INDEX_LENGTH AS TOTAL_LENGTH
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA NOT IN
('PERFORMANCE_SCHEMA','INFORMATION_SCHEMA')

And other “common” metrics
• Various MySQL status counters
• QPS (questions)
• Threads connected
• Temporary tables on disk
• Etc.
• Various server statistics
• %CPU Idle
• Free disk space
• I/O utilization
• Network traffic
• Etc.

Future collectors
• pt-query-digest/mysqlslow query statistics
• Data from “show engine innodb status”
• (that is missing from counters)
• PERFORMANCE_SCHEMA (MySQL 5.6+)
• Query statistics
• Processlist information
• Background thread information

In all seriousness, though...
• Easily see aggregate graphs
• Easily build graphs on-the-fly
• Full granularity forever
• API request for raw data
• Cluster-wide nagios checks with check_tsd

Challenges Switching
• Aggregates are the default
• Mouse-zooming (patched!)
• Auto-suggest for metrics
• “The graphs aren’t pretty”
• Migrating from proof of concept
• Plan for 3+ machines
• Data pruning may be required

Some
Quick
Numbers OpenTSDB @ Box
 21,294 metrics
 72 tag keys
 5,145,745 tag values
 90% Interactive graphs
return <300ms

Enjoy #PerconaLive 2013
We’re hiring!
https://www.box.com/about-us/careers/
geoff@box.com

Image credits
 http://upload.wikimedia.org/wikipedia/commons/7/7b/Batelco_Network_Operations_Centre_(NOC).JPG
 http://www.flickr.com/photos/hoyvinmayvin/5873697252/
 http://www.percona.com/doc/percona-monitoring-plugins
 http://www.2cto.com/uploadfile/2012/0731/20120731112415744.jpg
 http://media.tumblr.com/tumblr_lvfspoenWU1qi19a2.png
 http://img.izismile.com/img/img4/20110527/640/you_can_be_a_superhero_640_01.jpg
 http://openclipart.org/image/250px/svg_to_png/26427/Anonymous_notebook.png
 http://images.alphacoders.com/768/2560-1600-76893.jpg
 http://www.flickr.com/photos/in365/4861180503/
 http://openclipart.org/image/250px/svg_to_png/130915/Prohibido_3D.png
 http://www.flickr.com/photos/61114149@N02/5566484951/
 http://opentsdb.net/img/tsd-sample.png
 http://images2.wikia.nocookie.net/__cb20080911160202/bttf/images/5/57/WhatdidItellyou-HQ.jpg
 http://www.flickr.com/photos/lisakayaks/3028350539/
 http://www.flickr.com/photos/25566302@N00/1472400115
 http://www.flickr.com/photos/grandmaitre/5846058698/
 http://www.flickr.com/photos/7518432@N06/2673347604/

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