What do you monitor in MySQL?

If you are unfamiliar with what to monitor in MySQL, starting with looking at what popular Monitoring products monitor. For example, the following is the list of MySQL Cacti Plugin measurements.

Innodb Buffer Pool Activity

  • Pages Created
  • Pages Written
  • Pages Read

Innodb Buffer Pool Pages

  • Pool Size
  • Database Pages
  • Free Pages
  • Modified Pages

Inoodb File I/O

  • File Reads
  • Files Writes
  • Log Writes
  • File Fsyncs

Innodb Pending I/O

  • Aio Log Ios
  • Aio Sync ios
  • Buffer Pool Flushes
  • Chkp Writes
  • Ibuf Aio Reads
  • Log Flushes
  • Log Writes
  • Normal Aio Reads
  • Normal Aio Writes

Innodb Insert Buffer

  • Inserts
  • Merged
  • Merges

Innodb Log

  • Log Buffer Size
  • Log Bytes Written
  • Log Bytes Flushed
  • Unflushed Log

Innodb Row Operations

  • Rows Read
  • Rows Deleted
  • Rows Updated
  • Rows Inserted

Innodb Semaphores

  • Spin Rounds
  • Spin Waits
  • OS Waits

Innodb Transactions

  • Innodb Transactions
  • Current Transactions
  • History List
  • Read Views

MySQL Binary/Relay Logs

  • Binlog Cache use
  • Binlog Cache Disk Use
  • Binary Log Space
  • Relay Log Space

MySQL Command Counters

  • Questions
  • SELECT
  • DELETE
  • INSERT
  • UPDATE
  • REPLACE
  • LOAD
  • DELETE MULTI
  • INSERT SELECT
  • UPDATE MULTI
  • REPLACE SELECT

MySQL Connections

  • Max Connections
  • Max Used Connections
  • Aborted Clients
  • Aborted Connects
  • Threads Connected
  • Connections

MySQL Files and Tables

  • Table Cache
  • Open Tables
  • Open Files
  • Opened Tables

MySQL Network Traffic

  • Bytes Received
  • Bytes Sent

MySQL Processlist

  • State Closing Tables
  • State Copying to Tmp Table
  • State End
  • State Freeing Items
  • State Init
  • State Locked
  • State Login
  • State Preparing
  • State Reading From Net
  • State Sending Data
  • State Sorting Result
  • State Statistics
  • State Updating
  • State Writing to Net
  • State None
  • State Other

MySQL Query Cache

  • Queries In Cache
  • Hits
  • Inserts
  • Not Cached
  • Lowmem Prunes

MySQL Query Cache Memory

  • Query Cache Size
  • Free Memory
  • Total Blocks
  • Free Blocks

MySQL Replication

  • Slave Running
  • Slave Stopped
  • Slave Lag
  • Slave Open Temp Tables
  • Slave Retried Transactions

MySQL Select Types

  • Select Full Join
  • Select Full Range Join
  • Select Range
  • Select Range Check
  • Select Scan

MySQL Sorts

  • Sort Rows
  • Sort Range
  • Sort Merge Passes
  • Sort Scan

MySQL Table Locks

  • Table Locks Immediate
  • Table Locks Waited
  • Slow Queries

MySQL Temporary Objects

  • Created Tmp Tables
  • Created Tmp Disk Tables
  • Created Tmp Files

MySQL Threads

  • Thread Cache Size
  • Threads Created

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