Release Notes
Product Announcements
Classification | Metric Name | Unit | Descriptions |
CPU | CPU Usage | % | Percentage of actual CPU consumption Note： When the user's business QPS is less than 5 or there is no business database, the CPU will be displayed as 0. For instances with cloud disk architecture, the CPU metrics are collected from the CPU of the machine where the instance is deployed. In cases of smaller specifications (such as 2C or 4C), there may be some fluctuations. |
Memory | Memory Usage | MB | Total memory usage |
| Max Memory | KBytes | Max memory |
| Memory Usage Rate | % | Memory usage rate |
| Internal System Locked Memory | KBytes | Internal system locked memory This monitoring metric can be viewed only in 2014 and later versions. |
| Internal System Consumed Memory | KBytes | Internal system consumed memory This monitoring metric can be viewed only in 2014 and later versions. |
| Total XTP memory usage | KBytes/s | Usage of the XTP memory-optimized temporary table. |
Storage | Disk Throughput | KBytes/s | The total size of data written and read to the disk per second |
| Disk Read Traffic | KBytes/s | Amount of data read from disk to memory per second |
| Disk Write Traffic | KBytes/s | Amount of data written from memory to disk per second |
| Disk IOPS | Times/sec | Number of disk read and write times |
| Number of Disk Read Times | Times/sec | Number of disk read times per second |
| Number of Disk Write Times | Times/sec | Number of disk write times per second |
| Used Storage | GB | Sum of storage space consumed by instance database files and log files |
| Proportion of remaining disk space | % | Percentage of remaining hard disk capacity, calculated as: (Purchased disk - Used storage space) / Purchased disk |
| Read IO Average Response Time | ms | The average time required to read data from the disk, measured in seconds, for monitoring the machines deployed with two-node cloud disk instances and system-level monitoring of machines deployed with two-node local disk instances. |
| Write IO Average Response Time | ms | The average time required to write data to the disk, measured in seconds, for monitoring the machines deployed with two-node cloud disk instances and system-level monitoring of machines deployed with two-node local disk instances. |
| IO Request Average Response Time | ms | Average response time per IO request (for system-level monitoring of machines deployed with dual node local disk instances) |
| Number of Read IOs Per Second on Disk | Count/s | Number of read IOs per second on disk (for system-level monitoring of machines deployed with dual node local disk instances) |
| Number of Write IOs Per Second on Disk | Count/s | Number of write IOs per second on disk (for system-level monitoring of machines deployed with dual-node local disk instances) |
| Total Disk IOPS | Count/s | Total IOPS on disk (for system-level monitoring of machines deployed with dual-node local disk instances) |
| Disk Queue Length | Count | Disk queue length |
Network | Inbound Traffic | KB/s | Sum of inbound packet sizes for all connections |
| Outbound Traffic | KB/s | Sum of outbound packet sizes for all connections |
| Average Network I/O Delay | ms | Average network I/O delay time |
| RO Sync Delay Time | s | Data sync delay time between primary instances and read-only instances |
Connection | Number of Connections | Connections | Average number of databases connected by users per second |
| Number of Logins Per Second | Times/sec | Number of logins per second |
| Number of Logouts Per Second | Times/sec | Number of logouts per second |
Access | Slow Queries | Queries | Number of queries running longer than one second |
| Number of Requests | Times/sec | Average number of requests per second |
| Number of SQL Compilations | Times/sec | Average number of SQL compilations per second |
| Number of SQL Recompilations | Times/sec | Average number of SQL recompilations per second |
| Number of Full-Table Scans for SQL Per Second | Times/sec | Number of full-table scans for SQL per second |
| Number of Transactions | Times/sec | Average number of transactions per second |
| Number of Blockings | Blockings | Number of current blockings |
| Execution Cache Hit Rate | % | Each SQL statement has an execution plan, the hit rate of the execution plan. |
| Buffer Cache Hit Rate | % | Data cache (memory) hit rate |
Lock | Number of Lock Requests | Times/sec | Average number of lock requests per second |
| Number of Latch Waits Per Second | Times/sec | Number of latch waits per second |
| Average Latency on a Lock Wait | ms | Average wait time of each lock request resulting in wait |
| Number of Deadlocks | Count/s | Number of lock requests causing deadlocks per second |
| Blocking Report Generation Threshold | Count | The specified threshold for generating blocking reports. If the threshold is exceeded, a blocked process report will be generated. By default, blocking process reports are not generated. |
| Number of lock timeouts per second | Count/s | Number of lock requests that timed out per second, including NOWAIT lock requests. |
| Latch wait delay | ms | Average waiting time of latch resource requests. |
Others | Number of User Errors | Times/sec | Average number of errors per second |
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