Diagnosis Item Name | Category | Description |
Connectivity check | Availability | Unable to connect to the database |
Slow insertion, update, or deletion | Performance | There is a thread pending for a long time |
Slow SQL | Performance | There is a thread that is in the status of temp table creation, temp table replication, result sorting, etc. |
Row lock wait | Performance | There is a transaction with lock wait |
Uncommitted transaction | Performance | There is a thread in sleep status for a long time |
DDL statement metadata lock wait | Performance | There is a thread running DDL statements with metadata lock wait |
INSERT, UPDATE, and DELETE statement metadata lock wait | Performance | There is a thread running IUD statements with metadata lock wait |
SELECT statement metadata lock wait | Performance | There is a thread running SELECT statements with metadata lock wait |
Deadlock | Reliability | A deadlock is detected in the monitoring data, and the deadlock information exists in INNODB STATUS |
Read-only lock | Performance | There is a thread with global read-only lock wait |
SQL statement metadata lock wait | Performance | There is a thread running DDL statements with metadata lock wait |
Waiting for flush tables | Performance | There is a thread waiting for flush table |
High number of active sessions | Performance | The number of active sessions exceeds three times the CPU specification of the database instance |
High disk utilization | Reliability | The disk utilization is too high |
Memory utilization | Reliability | The memory utilization is too high |
High CPU utilization | Performance | The CPU utilization is too high |
Low hit rate of table open cache | Performance | The hit rate of the table open cache is low |
High-Risk account | Maintainability | There are anonymous or password-free accounts |
Big table | Maintainability | The size of a single table exceeds 10% of the instance disk specification |
I/O replication thread interruption | Reliability | A replication monitoring metric is abnormal and triggers diagnosis, and there is an I/O thread exception in SHOW SLAVE STATUS |
SQL replication thread interruption | Reliability | A replication monitoring metric is abnormal and triggers diagnosis, and there is a SQL thread exception in SHOW SLAVE STATUS |
Replication delay caused by DDL | Reliability | A replication monitoring metric is abnormal and triggers diagnosis, and there is a thread running DDL statements with metadata lock wait |
Replication delay caused by transaction | Reliability | A replication monitoring metric is abnormal and triggers diagnosis, and there is a thread in sleep status with metadata lock wait |
Replication delay caused by read-only lock | Reliability | A replication monitoring metric is abnormal and triggers diagnosis, and there is a thread with global read-only lock wait |
Primary-Secondary switch | Availability | The primary-secondary switch monitoring metric is abnormal |
Instance migration caused by server failure | Availability | The monitoring metric of instance migration is abnormal due to a server failure |
Read-only instance removal | Availability | The read-only instance removal monitoring metric is abnormal |
Disk limit exceeded | Availability | The disk limit monitoring metric is abnormal |
Memory limit exceeded | Availability | The memory limit monitoring metric is abnormal |
OOM | Availability | The database memory is overloaded |
Error command (ErrCmd) | Maintainability | There is a command execution error. The current number of errors is %d (only for Redis) |
High-risk command (RiskCmd) | Maintainability | The KEYS command is detected (only for Redis) |
Proxy load/inbound traffic/outbound traffic/balance conditions | Maintainability | The proxy load/inbound traffic/outbound traffic/balance conditions are abnormal (only for Redis) |
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