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groups: - name: MySQLStatsAlert rules: - alert: MySQL is down expr: mysql_up == 0 for: 1m labels: severity: critical annotations: summary: "Instance {{ $labels.instance }} MySQL is down" description: "MySQL database is down. This requires immediate action!" - alert: open files high expr: mysql_global_status_innodb_num_open_files > (mysql_global_variables_open_files_limit) * 0.75 for: 1m labels: severity: warning annotations: summary: "Instance {{ $labels.instance }} open files high" description: "Open files is high. Please consider increasing open_files_limit." - alert: Read buffer size is bigger than max. allowed packet size expr: mysql_global_variables_read_buffer_size > mysql_global_variables_slave_max_allowed_packet for: 1m labels: severity: warning annotations: summary: "Instance {{ $labels.instance }} Read buffer size is bigger than max. allowed packet size" description: "Read buffer size (read_buffer_size) is bigger than max. allowed packet size (max_allowed_packet).This can break your replication." - alert: Sort buffer possibly missconfigured expr: mysql_global_variables_innodb_sort_buffer_size <256*1024 or mysql_global_variables_read_buffer_size > 4*1024*1024 for: 1m labels: severity: warning annotations: summary: "Instance {{ $labels.instance }} Sort buffer possibly missconfigured" description: "Sort buffer size is either too big or too small. A good value for sort_buffer_size is between 256k and 4M." - alert: Thread stack size is too small expr: mysql_global_variables_thread_stack <196608 for: 1m labels: severity: warning annotations: summary: "Instance {{ $labels.instance }} Thread stack size is too small" description: "Thread stack size is too small. This can cause problems when you use Stored Language constructs for example. A typical is 256k for thread_stack_size." - alert: Used more than 80% of max connections limited expr: mysql_global_status_max_used_connections > mysql_global_variables_max_connections * 0.8 for: 1m labels: severity: warning annotations: summary: "Instance {{ $labels.instance }} Used more than 80% of max connections limited" description: "Used more than 80% of max connections limited" - alert: InnoDB Force Recovery is enabled expr: mysql_global_variables_innodb_force_recovery != 0 for: 1m labels: severity: warning annotations: summary: "Instance {{ $labels.instance }} InnoDB Force Recovery is enabled" description: "InnoDB Force Recovery is enabled. This mode should be used for data recovery purposes only. It prohibits writing to the data." - alert: InnoDB Log File size is too small expr: mysql_global_variables_innodb_log_file_size < 16777216 for: 1m labels: severity: warning annotations: summary: "Instance {{ $labels.instance }} InnoDB Log File size is too small" description: "The InnoDB Log File size is possibly too small. Choosing a small InnoDB Log File size can have significant performance impacts." - alert: InnoDB Flush Log at Transaction Commit expr: mysql_global_variables_innodb_flush_log_at_trx_commit != 1 for: 1m labels: severity: warning annotations: summary: "Instance {{ $labels.instance }} InnoDB Flush Log at Transaction Commit" description: "InnoDB Flush Log at Transaction Commit is set to a values != 1. This can lead to a loss of commited transactions in case of a power failure." - alert: Table definition cache too small expr: mysql_global_status_open_table_definitions > mysql_global_variables_table_definition_cache for: 1m labels: severity: page annotations: summary: "Instance {{ $labels.instance }} Table definition cache too small" description: "Your Table Definition Cache is possibly too small. If it is much too small this can have significant performance impacts!" - alert: Table open cache too small expr: mysql_global_status_open_tables >mysql_global_variables_table_open_cache * 99/100 for: 1m labels: severity: page annotations: summary: "Instance {{ $labels.instance }} Table open cache too small" description: "Your Table Open Cache is possibly too small (old name Table Cache). If it is much too small this can have significant performance impacts!" - alert: Thread stack size is possibly too small expr: mysql_global_variables_thread_stack < 262144 for: 1m labels: severity: page annotations: summary: "Instance {{ $labels.instance }} Thread stack size is possibly too small" description: "Thread stack size is possibly too small. This can cause problems when you use Stored Language constructs for example. A typical is 256k for thread_stack_size." - alert: InnoDB Buffer Pool Instances is too small expr: mysql_global_variables_innodb_buffer_pool_instances == 1 for: 1m labels: severity: page annotations: summary: "Instance {{ $labels.instance }} InnoDB Buffer Pool Instances is too small" description: "If you are using MySQL 5.5 and higher you should use several InnoDB Buffer Pool Instances for performance reasons. Some rules are: InnoDB Buffer Pool Instance should be at least 1 Gbyte in size. InnoDB Buffer Pool Instances you can set equal to the number of cores of your machine." - alert: InnoDB Plugin is enabled expr: mysql_global_variables_ignore_builtin_innodb == 1 for: 1m labels: severity: page annotations: summary: "Instance {{ $labels.instance }} InnoDB Plugin is enabled" description: "InnoDB Plugin is enabled" - alert: Binary Log is disabled expr: mysql_global_variables_log_bin != 1 for: 1m labels: severity: warning annotations: summary: "Instance {{ $labels.instance }} Binary Log is disabled" description: "Binary Log is disabled. This prohibits you to do Point in Time Recovery (PiTR)." - alert: Binlog Cache size too small expr: mysql_global_variables_binlog_cache_size < 1048576 for: 1m labels: severity: page annotations: summary: "Instance {{ $labels.instance }} Binlog Cache size too small" description: "Binlog Cache size is possibly to small. A value of 1 Mbyte or higher is OK." - alert: Binlog Statement Cache size too small expr: mysql_global_variables_binlog_stmt_cache_size <1048576 and mysql_global_variables_binlog_stmt_cache_size > 0 for: 1m labels: severity: page annotations: summary: "Instance {{ $labels.instance }} Binlog Statement Cache size too small" description: "Binlog Statement Cache size is possibly to small. A value of 1 Mbyte or higher is typically OK." - alert: Binlog Transaction Cache size too small expr: mysql_global_variables_binlog_cache_size <1048576 for: 1m labels: severity: page annotations: summary: "Instance {{ $labels.instance }} Binlog Transaction Cache size too small" description: "Binlog Transaction Cache size is possibly to small. A value of 1 Mbyte or higher is typically OK." - alert: Sync Binlog is enabled expr: mysql_global_variables_sync_binlog == 1 for: 1m labels: severity: page annotations: summary: "Instance {{ $labels.instance }} Sync Binlog is enabled" description: "Sync Binlog is enabled. This leads to higher data security but on the cost of write performance." - alert: IO thread stopped expr: mysql_slave_status_slave_io_running != 1 for: 1m labels: severity: critical annotations: summary: "Instance {{ $labels.instance }} IO thread stopped" description: "IO thread has stopped. This is usually because it cannot connect to the Master any more." - alert: SQL thread stopped expr: mysql_slave_status_slave_sql_running == 0 for: 1m labels: severity: critical annotations: summary: "Instance {{ $labels.instance }} SQL thread stopped" description: "SQL thread has stopped. This is usually because it cannot apply a SQL statement received from the master." - alert: SQL thread stopped expr: mysql_slave_status_slave_sql_running != 1 for: 1m labels: severity: critical annotations: summary: "Instance {{ $labels.instance }} Sync Binlog is enabled" description: "SQL thread has stopped. This is usually because it cannot apply a SQL statement received from the master." - alert: Slave lagging behind Master expr: rate(mysql_slave_status_seconds_behind_master[1m]) >30 for: 1m labels: severity: warning annotations: summary: "Instance {{ $labels.instance }} Slave lagging behind Master" description: "Slave is lagging behind Master. Please check if Slave threads are running and if there are some performance issues!" - alert: Slave is NOT read only(Please ignore this warning indicator.) expr: mysql_global_variables_read_only != 0 for: 1m labels: severity: page annotations: summary: "Instance {{ $labels.instance }} Slave is NOT read only" description: "Slave is NOT set to read only. You can accidentally manipulate data on the slave and get inconsistencies..." (责任编辑：IT) |