MySQL by Zabbix agent
Macros used
| Name | Value |
|---|---|
| {$MYSQL.ABORTED_CONN.MAX.WARN} | 3 |
| {$MYSQL.BUFF_UTIL.MIN.WARN} | 50 |
| {$MYSQL.CREATED_TMP_DISK_TABLES.MAX.WARN} | 10 |
| {$MYSQL.CREATED_TMP_FILES.MAX.WARN} | 10 |
| {$MYSQL.CREATED_TMP_TABLES.MAX.WARN} | 30 |
| {$MYSQL.HOST} | localhost |
| {$MYSQL.INNODB_LOG_FILES} | 2 |
| {$MYSQL.PORT} | 3306 |
| {$MYSQL.REPL_LAG.MAX.WARN} | 30m |
| {$MYSQL.SLOW_QUERIES.MAX.WARN} | 3 |
Items collected
| Name | Description | Type | Interval | Key and additional info |
|---|---|---|---|---|
| MySQL: Aborted clients per second | Number of connections that were aborted because the client died without closing the connection properly. | DEPENDENT | - | mysql.aborted_clients.rate |
| MySQL: Aborted connections per second | Number of failed attempts to connect to the MySQL server. | DEPENDENT | - | mysql.aborted_connects.rate |
| MySQL: Binlog cache disk use | Number of transactions that used a temporary disk cache because they could not fit in the regular binary log cache, being larger than binlog_cache_size. | DEPENDENT | - | mysql.binlog_cache_disk_use |
| MySQL: Buffer pool efficiency | The item shows how effectively the buffer pool is serving reads. | CALCULATED | - | mysql.buffer_pool_efficiency |
| MySQL: Buffer pool utilization | Ratio of used to total pages in the buffer pool. | CALCULATED | - | mysql.buffer_pool_utilization |
| MySQL: Bytes received | Number of bytes received from all clients. | DEPENDENT | - | mysql.bytes_received.rate |
| MySQL: Bytes sent | Number of bytes sent to all clients. | DEPENDENT | - | mysql.bytes_sent.rate |
| MySQL: Command Delete per second | The Com_delete counter variable indicates the number of times the delete statement has been executed. | DEPENDENT | - | mysql.com_delete.rate |
| MySQL: Command Insert per second | The Com_insert counter variable indicates the number of times the insert statement has been executed. | DEPENDENT | - | mysql.com_insert.rate |
| MySQL: Command Select per second | The Com_select counter variable indicates the number of times the select statement has been executed. | DEPENDENT | - | mysql.com_select.rate |
| MySQL: Command Update per second | The Com_update counter variable indicates the number of times the update statement has been executed. | DEPENDENT | - | mysql.com_update.rate |
| MySQL: Connections per second | Number of connection attempts (successful or not) to the MySQL server. | DEPENDENT | - | mysql.connections.rate |
| MySQL: Connection errors accept per second | Number of errors that occurred during calls to accept() on the listening port. | DEPENDENT | - | mysql.connection_errors_accept.rate |
| MySQL: Connection errors internal per second | Number of refused connections due to internal server errors, for example, out of memory errors, or failed thread starts. | DEPENDENT | - | mysql.connection_errors_internal.rate |
| MySQL: Connection errors max connections per second | Number of refused connections due to the max_connections limit being reached. | DEPENDENT | - | mysql.connection_errors_max_connections.rate |
| MySQL: Connection errors peer address per second | Number of errors while searching for the connecting client IP address. | DEPENDENT | - | mysql.connection_errors_peer_address.rate |
| MySQL: Connection errors select per second | Number of errors during calls to select() or poll() on the listening port. The client would not necessarily have been rejected in these cases. | DEPENDENT | - | mysql.connection_errors_select.rate |
| MySQL: Connection errors tcpwrap per second | Number of connections the libwrap library has refused. | DEPENDENT | - | mysql.connection_errors_tcpwrap.rate |
| MySQL: Created tmp tables on disk per second | Number of internal on-disk temporary tables created by the server while executing statements. | DEPENDENT | - | mysql.created_tmp_disk_tables.rate |
| MySQL: Created tmp files on disk per second | How many temporary files mysqld has created. | DEPENDENT | - | mysql.created_tmp_files.rate |
| MySQL: Created tmp tables on memory per second | Number of internal temporary tables created by the server while executing statements. | DEPENDENT | - | mysql.created_tmp_tables.rate |
| MySQL: Get status variables | The item gets server global status information. | - | - | mysql.get_status_variables["{$MYSQL.HOST}","{$MYSQL.PORT}"] |
| MySQL: InnoDB buffer pool pages free | The total size of the InnoDB buffer pool, in pages. | DEPENDENT | - | mysql.innodb_buffer_pool_pages_free |
| MySQL: InnoDB buffer pool pages total | The total size of the InnoDB buffer pool, in pages. | DEPENDENT | - | mysql.innodb_buffer_pool_pages_total |
| MySQL: InnoDB buffer pool reads | Number of logical reads that InnoDB could not satisfy from the buffer pool, and had to read directly from the disk. | DEPENDENT | - | mysql.innodb_buffer_pool_reads |
| MySQL: InnoDB buffer pool reads per second | Number of logical reads per second that InnoDB could not satisfy from the buffer pool, and had to read directly from the disk. | DEPENDENT | - | mysql.innodb_buffer_pool_reads.rate |
| MySQL: InnoDB buffer pool read requests | Number of logical read requests. | DEPENDENT | - | mysql.innodb_buffer_pool_read_requests |
| MySQL: InnoDB buffer pool read requests per second | Number of logical read requests per second. | DEPENDENT | - | mysql.innodb_buffer_pool_read_requests.rate |
| MySQL: Innodb buffer pool wait free | Number of times InnoDB waited for a free page before reading or creating a page. Normally, writes to the InnoDB buffer pool happen in the background. When no clean pages are available, dirty pages are flushed first in order to free some up. This counts the numbers of wait for this operation to finish. If this value is not small, look at the increasing innodb_buffer_pool_size. | DEPENDENT | - | mysql.innodb_buffer_pool_wait_free |
| MySQL: Calculated value of innodb_log_file_size | Calculated by (innodb_os_log_written-innodb_os_log_written(time shift -1h))/{$MYSQL.INNODB_LOG_FILES} value of the innodb_log_file_size. Innodb_log_file_size is the size in bytes of the each InnoDB redo log file in the log group. The combined size can be no more than 512GB. Larger values mean less disk I/O due to less flushing checkpoint activity, but also slower recovery from a crash. | CALCULATED | - | mysql.innodb_log_file_size |
| MySQL: Innodb number open files | Number of open files held by InnoDB. InnoDB only. | DEPENDENT | - | mysql.innodb_num_open_files |
| MySQL: Innodb log written | Number of bytes written to the InnoDB log. | DEPENDENT | - | mysql.innodb_os_log_written |
| MySQL: InnoDB row lock time | The total time spent in acquiring row locks for InnoDB tables, in milliseconds. | DEPENDENT | - | mysql.innodb_row_lock_time |
| MySQL: InnoDB row lock time max | The maximum time to acquire a row lock for InnoDB tables, in milliseconds. | DEPENDENT | - | mysql.innodb_row_lock_time_max |
| MySQL: InnoDB row lock waits | Number of times operations on InnoDB tables had to wait for a row lock. | DEPENDENT | - | mysql.innodb_row_lock_waits |
| MySQL: Max used connections | The maximum number of connections that have been in use simultaneously since the server start. | DEPENDENT | - | mysql.max_used_connections |
| MySQL: Open tables | Number of tables that are open. | DEPENDENT | - | mysql.open_tables |
| MySQL: Open table definitions | Number of cached table definitions. | DEPENDENT | - | mysql.open_table_definitions |
| MySQL: Status | - | - | - | mysql.ping["{$MYSQL.HOST}","{$MYSQL.PORT}"] |
| MySQL: Queries per second | Number of statements executed by the server. This variable includes statements executed within stored programs, unlike the Questions variable. | DEPENDENT | - | mysql.queries.rate |
| MySQL: Questions per second | Number of statements executed by the server. This includes only statements sent to the server by clients and not statements executed within stored programs, unlike the Queries variable. | DEPENDENT | - | mysql.questions.rate |
| MySQL: Slow queries per second | Number of queries that have taken more than long_query_time seconds. | DEPENDENT | - | mysql.slow_queries.rate |
| MySQL: Threads cached | Number of threads in the thread cache. | DEPENDENT | - | mysql.threads_cached |
| MySQL: Threads connected | Number of currently open connections. | DEPENDENT | - | mysql.threads_connected |
| MySQL: Threads created per second | Number of threads created to handle connections. If Threads_created is big, you may want to increase the thread_cache_size value. The cache miss rate can be calculated as Threads_created/Connections. | DEPENDENT | - | mysql.threads_created.rate |
| MySQL: Threads running | Number of threads which are not sleeping. | DEPENDENT | - | mysql.threads_running |
| MySQL: Uptime | The amount of seconds that the server has been up. | DEPENDENT | - | mysql.uptime |
| MySQL: Version | - | - | 15m | mysql.version["{$MYSQL.HOST}","{$MYSQL.PORT}"] |
Triggers
| Name | Description | Expression | Priority | Dependencies |
|---|---|---|---|---|
| MySQL: Server has aborted connections | The number of failed attempts to connect to the MySQL server is more than {$MYSQL.ABORTED_CONN.MAX.WARN} in the last 5 minutes. | min(/MySQL by Zabbix agent/mysql.aborted_connects.rate,5m)>{$MYSQL.ABORTED_CONN.MAX.WARN} | AVERAGE ⚠ | MySQL: Aborted connections per second |
| MySQL: Buffer pool utilization is too low | The buffer pool utilization is less than {$MYSQL.BUFF_UTIL.MIN.WARN}% in the last 5 minutes. This means that there is a lot of unused RAM allocated for the buffer pool, which you can easily reallocate at the moment. | max(/MySQL by Zabbix agent/mysql.buffer_pool_utilization,5m)<{$MYSQL.BUFF_UTIL.MIN.WARN} | WARNING 📢 | MySQL: Buffer pool utilization |
| MySQL: Refused connections | Number of refused connections due to the max_connections limit being reached. | last(/MySQL by Zabbix agent/mysql.connection_errors_max_connections.rate)>0 | AVERAGE ⚠ | MySQL: Connection errors max connections per second |
| MySQL: Number of on-disk temporary tables created per second is high | Possibly the application using the database is in need of query optimization. | min(/MySQL by Zabbix agent/mysql.created_tmp_disk_tables.rate,5m)>{$MYSQL.CREATED_TMP_DISK_TABLES.MAX.WARN} | WARNING 📢 | MySQL: Created tmp tables on disk per second |
| MySQL: Number of temporary files created per second is high | Possibly the application using the database is in need of query optimization. | min(/MySQL by Zabbix agent/mysql.created_tmp_files.rate,5m)>{$MYSQL.CREATED_TMP_FILES.MAX.WARN} | WARNING 📢 | MySQL: Created tmp files on disk per second |
| MySQL: Number of internal temporary tables created per second is high | Possibly the application using the database is in need of query optimization. | min(/MySQL by Zabbix agent/mysql.created_tmp_tables.rate,5m)>{$MYSQL.CREATED_TMP_TABLES.MAX.WARN} | WARNING 📢 | MySQL: Created tmp tables on memory per second |
| MySQL: Service is down | - | last(/MySQL by Zabbix agent/mysql.ping["{$MYSQL.HOST}","{$MYSQL.PORT}"])=0 | HIGH ⛔ | MySQL: Status |
| MySQL: Server has slow queries | The number of slow queries is more than {$MYSQL.SLOW_QUERIES.MAX.WARN} in the last 5 minutes. | min(/MySQL by Zabbix agent/mysql.slow_queries.rate,5m)>{$MYSQL.SLOW_QUERIES.MAX.WARN} | WARNING 📢 | MySQL: Slow queries per second |
| MySQL: Failed to fetch info data | Zabbix has not received data for items for the last 30 minutes. | nodata(/MySQL by Zabbix agent/mysql.uptime,30m)=1 | INFO 🔔 | MySQL: Uptime |
| MySQL: Service has been restarted | MySQL uptime is less than 10 minutes. | last(/MySQL by Zabbix agent/mysql.uptime)<10m | INFO 🔔 | MySQL: Uptime |
| MySQL: Version has changed | MySQL version has changed. Ack to close. | last(/MySQL by Zabbix agent/mysql.version["{$MYSQL.HOST}","{$MYSQL.PORT}"],#1)<>last(/MySQL by Zabbix agent/mysql.version["{$MYSQL.HOST}","{$MYSQL.PORT}"],#2) and length(last(/MySQL by Zabbix agent/mysql.version["{$MYSQL.HOST}","{$MYSQL.PORT}"]))>0 | INFO 🔔 | MySQL: Version |
Discovery rule №1
| Name | Description | Type | Interval | Key and additional info |
|---|---|---|---|---|
| Database discovery | Scanning databases in DBMS. | - | 1h | mysql.db.discovery["{$MYSQL.HOST}","{$MYSQL.PORT}"] |
Item prototypes
| Name | Description | Type | Interval | Key and additional info |
|---|---|---|---|---|
| MySQL: Size of database {#DBNAME} | - | - | 5m | mysql.dbsize["{$MYSQL.HOST}","{$MYSQL.PORT}","{#DBNAME}"] |
Discovery rule №2
| Name | Description | Type | Interval | Key and additional info |
|---|---|---|---|---|
| MariaDB discovery | Additional metrics if MariaDB is used. | DEPENDENT | 0 | mysql.extra_metric.discovery |
Item prototypes
| Name | Description | Type | Interval | Key and additional info |
|---|---|---|---|---|
| MySQL: Binlog commits | Total number of transactions committed to the binary log. | DEPENDENT | - | mysql.binlog_commits[{#SINGLETON}] |
| MySQL: Binlog group commits | Total number of group commits done to the binary log. | DEPENDENT | - | mysql.binlog_group_commits[{#SINGLETON}] |
| MySQL: Master GTID wait count | The number of times MASTER_GTID_WAIT called. | DEPENDENT | - | mysql.master_gtid_wait_count[{#SINGLETON}] |
| MySQL: Master GTID wait timeouts | Number of timeouts occurring in MASTER_GTID_WAIT. | DEPENDENT | - | mysql.master_gtid_wait_timeouts[{#SINGLETON}] |
| MySQL: Master GTID wait time | Total number of time spent in MASTER_GTID_WAIT. | DEPENDENT | - | mysql.master_gtid_wait_time[{#SINGLETON}] |
Discovery rule №3
| Name | Description | Type | Interval | Key and additional info |
|---|---|---|---|---|
| Replication discovery | If "show slave status" returns Master_Host, "Replication: *" items are created. | - | 1h | mysql.replication.discovery["{$MYSQL.HOST}","{$MYSQL.PORT}"] |
Item prototypes
| Name | Description | Type | Interval | Key and additional info |
|---|---|---|---|---|
| MySQL: Replication Seconds Behind Master {#MASTERHOST} | The number of seconds that the slave SQL thread is behind processing the master binary log. A high number (or an increasing one) can indicate that the slave is unable to handle events from the master in a timely fashion. | DEPENDENT | - | mysql.seconds_behind_master["{#MASTERHOST}"] |
| MySQL: Replication Slave IO Running {#MASTERHOST} | Whether the I/O thread for reading the master's binary log is running. Normally, you want this to be Yes unless you have not yet started replication or have explicitly stopped it with STOP SLAVE. | DEPENDENT | - | mysql.slave_io_running["{#MASTERHOST}"] |
| MySQL: Replication Slave SQL Running {#MASTERHOST} | Whether the SQL thread for executing events in the relay log is running. As with the I/O thread, this should normally be Yes. | DEPENDENT | - | mysql.slave_sql_running["{#MASTERHOST}"] |
| MySQL: Replication Slave SQL Running State {#MASTER_HOST} | This shows the state of the SQL driver threads. | DEPENDENT | - | mysql.slave_sql_running_state["{#MASTER_HOST}"] |
| MySQL: Replication Slave status {#MASTERHOST} | The item gets status information on the essential parameters of the slave threads. | - | - | mysql.slave_status["{$MYSQL.HOST}","{$MYSQL.PORT}","{#MASTERHOST}"] |
Trigger prototypes
| Name | Description | Expression | Priority | Dependencies |
|---|---|---|---|---|
| MySQL: Replication lag is too high | - | min(/MySQL by Zabbix agent/mysql.seconds_behind_master["{#MASTERHOST}"],5m)>{$MYSQL.REPL_LAG.MAX.WARN} | WARNING 📢 | MySQL: Replication Seconds Behind Master {#MASTERHOST} |
| MySQL: The slave I/O thread is not connected to a replication master | - | count(/MySQL by Zabbix agent/mysql.slave_io_running["{#MASTERHOST}"],#1,"ne","Yes")=1 | WARNING 📢 | MySQL: Replication Slave IO Running {#MASTERHOST} |
| MySQL: The slave I/O thread is not running | Whether the I/O thread for reading the master's binary log is running. | count(/MySQL by Zabbix agent/mysql.slave_io_running["{#MASTERHOST}"],#1,"eq","No")=1 | AVERAGE ⚠ | MySQL: Replication Slave IO Running {#MASTERHOST} |
| MySQL: The SQL thread is not running | Whether the SQL thread for executing events in the relay log is running. | count(/MySQL by Zabbix agent/mysql.slave_sql_running["{#MASTERHOST}"],#1,"eq","No")=1 | WARNING 📢 | MySQL: Replication Slave SQL Running {#MASTERHOST} |