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Performance parameters

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Performance parameters can help you view the instance health status, connection status, storage status, connections, query concurrency, data storage, and node status in a visualized manner. This topic describes the performance parameters of AnalyticDB for PostgreSQL.

Elastic storage mode

You can call the DescribeHealthStatus operation to return the following metric parameters.

Parameter

Metric

Unit

Description

adbpg_status

Instance health status

N/A

  • critical: A coordinator node or compute node is unavailable. In this case, this metric is marked in red in the console.

  • healthy: All nodes are available. In this case, this metric is marked in green in the console.

adbpg_connection_status

Instance connection status

N/A

The connection health status of the instance. Valid values:

  • critical: The instance connection usage is greater than 95%. In this case, this metric is marked in red in the console.

  • warning: The instance connection usage is greater than 90% and less than or equal to 95%. In this case, this metric is marked in yellow in the console.

  • healthy: The instance connection usage is less than or equal to 90%. In this case, this metric is marked in green in the console.

Note

The instance connection usage is the maximum connection usage of all coordinator nodes and compute nodes.

adbpg_disk_status

Instance storage status

N/A

The storage status of the instance. Valid values:

  • critical: The instance storage usage is greater than or equal to 90%. In this case, this metric is marked in red in the console and the instance is locked.

  • warning: The instance storage usage is greater than or equal to 70% and less than 90%. In this case, this metric is marked in yellow in the console.

  • healthy: The instance storage usage is less than 70%. In this case, this metric is marked in green in the console.

Note

The instance storage usage is the average storage usage of all compute nodes.

adbpg_disk_usage_percent

Instance storage usage

%

The status corresponding to the storage usage of the instance. Valid values:

  • critical: The instance storage usage is greater than or equal to 90%. In this case, the instance is locked.

  • warning: The instance storage usage is greater than or equal to 70% and less than 90%.

  • healthy: The instance storage usage is less than 70%.

Note

The instance storage usage is the average storage usage of all compute nodes.

adbpg_master_disk_usage_percent_max

Maximum storage usage of coordinator nodes

%

The status corresponding to the maximum storage usage of all coordinator nodes. Valid values:

  • critical: The storage usage of coordinator nodes is greater than or equal to 90%. In this case, the instance is locked.

  • warning: The storage usage of coordinator nodes is greater than or equal to 70% and less than 90%.

  • healthy: The storage usage of coordinator nodes is less than 70%.

adbgp_segment_disk_usage_percent_max

Maximum storage usage of compute nodes

%

The status corresponding to the maximum storage usage of all compute nodes. Valid values:

  • critical: The storage usage of compute nodes is greater than or equal to 90%. In this case, the instance is locked.

  • warning: The storage usage of compute nodes is greater than or equal to 80% and less than 90%.

  • healthy: The storage usage of compute nodes is less than 80%.

node_master_status

Coordinator node health status

N/A

The health status of coordinator nodes. Valid values:

  • critical: A coordinator node is unavailable. In this case, this metric is marked in red in the console.

  • healthy: All coordinator nodes are available. In this case, this metric is marked in green in the console.

adbpg_master_status

node_segment_disk_status

Compute node storage status

N/A

The storage status of compute nodes. Valid values:

  • critical: The storage usage of compute nodes is greater than or equal to 90%. In this case, this metric is marked in red in the console and the instance is locked.

  • warning: The storage usage of compute nodes is greater than or equal to 80% and less than 90%. In this case, this metric is marked in yellow in the console.

  • healthy: The storage usage of compute nodes is less than 80%. In this case, this metric is marked in green in the console.

Note

The compute node storage usage is the maximum storage usage of all compute nodes.

node_master_connection_status

Coordinator node connection status

N/A

The connection status of coordinator nodes. Valid values:

  • critical: The connection usage of coordinator nodes is greater than or equal to 95%. In this case, this metric is marked in red in the console.

  • warning: The connection usage of coordinator nodes is greater than or equal to 90% and less than 95%. In this case, this metric is marked in yellow in the console.

  • healthy: The connection usage of coordinator nodes is less than 90%. In this case, this metric is marked in green in the console.

Note

The coordinator node connection usage is the maximum connection usage of all coordinator nodes.

adbpg_segment_status

node_segment_connection_status

Compute node connection status

N/A

The connection status of compute nodes. Valid values:

  • critical: The connection usage of compute nodes is greater than or equal to 95%. In this case, this metric is marked in red in the console.

  • warning: The connection usage of compute nodes is greater than or equal to 90% and less than 95%. In this case, this metric is marked in yellow in the console.

  • healthy: The connection usage of compute nodes is less than 90%. In this case, this metric is marked in green in the console.

Note

The compute node connection usage is the maximum connection usage of all compute nodes.

adbpg_instance_total_data_gb

Total storage

GB

The total volume of instance storage.

Note

This parameter is displayed in the console only for AnalyticDB for PostgreSQL instances of V6.3.11.3 or later.

adbpg_instance_hot_data_gb

Hot storage

GB

The total volume of hot storage.

Note

This parameter is displayed in the console only for AnalyticDB for PostgreSQL instances of V6.3.11.3 or later.

adbpg_instance_cold_data_gb

Cold storage

GB

The total volume of cold storage.

Note

This parameter is displayed in the console only for AnalyticDB for PostgreSQL instances of V6.3.11.3 or later.

You can call the DescribeDBClusterPerformance operation to return the following metric parameters.

Parameter

Metric

Unit

Description

adbpg_segment_cnt

Number of compute nodes

N/A

The number of compute nodes that are collected per hour.

adbpg_instance_disk_used_mb

Instance storage used

MB

The amount of storage space that is used by all compute nodes.

adbpg_instance_disk_usage_percent

Instance storage usage

%

The storage usage of the instance, which is calculated by using the following formula: Storage space used by all compute nodes/Reserved storage space of all compute nodes.

node_master_connection_count

Number of coordinator node connections

N/A

The number of connections to coordinator nodes.

node_segment_connection_count

Number of compute node connections

N/A

The number of connections to compute nodes.

node_segment_workfile_used_mb

Temporary disk file size

MB

The size of temporary files that are written to disks.

node_cpu_used_percent

CPU utilization

%

The CPU utilization of coordinator nodes or compute nodes.

node_mem_used_percent

Memory usage

%

The memory usage of coordinator nodes or compute nodes.

node_disk_iops_percent

I/O usage

%

The I/O usage of coordinator nodes or compute nodes.

node_disk_used_mb

Storage used

MB

The amount of storage space that is used by each compute node.

node_disk_usage_percent

Storage usage

%

The storage usage of each compute node, which is calculated by using the following formula: Storage space used by each compute node/Reserved storage space of each compute node.

adbpg_rsq_cost

Query cost for a resource queue

N/A

The estimated total cost of all queries that can be executed in the current queue. rsqCostLimit specifies the cost limit, and a value of -1 indicates no limit. rsqCostValue specifies the total cost of all queries that are being executed.

adbpg_rsq_count

Number of concurrent queries in a resource queue

N/A

The number of concurrent queries that can be executed in the current queue. If the number of concurrent queries reaches the upper limit, subsequent queries that are assigned to the query must wait for the queue. rsqCountLimit specifies the maximum number of concurrent queries that are allowed, and a value of -1 indicates no limit. rsqCountValue specifies the number of concurrent queries that are being executed.

adbpg_rsq_memory

Query memory for a resource queue

Byte

The amount of memory used by all queries that can be executed in the current queue. rsqMemoryLimit specifies the memory limit, and -1 indicates no limit. rsqMemoryValue specifies the amount of memory used by all queries that are being executed.

adbpg_rsq_waiters

Number of queries waiting for a resource queue

N/A

The number of queries that are waiting for resource queue slots in the current queue due to insufficient resources. If the number of queries that are being executed in a queue reaches the concurrency limit, subsequent queries that are assigned to the queue must wait until sufficient resources are available. These queries are in the waiting state in the pg_stat_activity view.

adbpg_rsq_holders

Number of executing queries in a resource queue

N/A

The number of queries that have obtained resource queue slots for execution in the current queue. These queries are not surely in the active state. If these queries have to wait for other resources such as row locks, they may be still in the waiting state. In this case, the resource queue slots that are occupied by these queries are not released.

Note

In most cases, the value of rsqCountValue is equivalent to that of rsqholders. In rare cases, the value of adbpg_rsq_holders may be greater than that of rsqCountValue. This is because resource queue locks may not be released after queries are executed due to system exceptions. If the issue of distinct differences between the values of adbpg_rsq_holders and rsqCountValue persists, contact Alibaba Cloud technical support.

adbpg_db_qps

Database queries per second (QPS)

N/A

The total number of read queries processed per second by each database. The query statements include SELECT, SELECT INTO, SELECT FOR UPDATE, and FETCH.

adbpg_db_tps

Database transactions per second (TPS)

N/A

The total number of write operations processed per second by each database. The write operations include INSERT, UPDATE, DELETE, and INSERT INTO SELECT.

adbpg_qps

Instance queries per second (QPS)

op/s

The total number of read queries processed per second by the instance. The query statements include SELECT, SELECT INTO, SELECT FOR UPDATE, and FETCH.

adbpg_tps

Instance transactions per second (TPS)

op/s

The total number of write operations processed per second by the instance. The write operations include INSERT, UPDATE, DELETE, and INSERT INTO SELECT.

adbpg_query_rt

Query response time

ms

The average read query response time of the instance. The query statements include SELECT, SELECT INTO, SELECT FOR UPDATE, and FETCH.

Note

This parameter is displayed in the console only for instances with kernel version 7.3.2.8 or 7.4.2.3 and later.

adbpg_insert_rt

Write response time

ms

The average write operation response time of the instance. The write operations include INSERT, UPDATE, DELETE, and INSERT INTO SELECT.

Note

This parameter is displayed in the console only for instances with kernel version 7.3.2.8 or 7.4.2.3 and later.

adbpg_query_failure_percent

Query failure rate

%

The average read query failure rate of the instance. The query statements include SELECT, SELECT INTO, SELECT FOR UPDATE, and FETCH.

Note

This parameter is displayed in the console only for instances with kernel version 7.3.2.8 or 7.4.2.3 and later.

adbpg_insert_failure_percent

Write failure rate

%

The average write operation failure rate of the instance. The write operations include INSERT, UPDATE, DELETE, and INSERT INTO SELECT.

Note

This parameter is displayed in the console only for instances with kernel version 7.3.2.8 or 7.4.2.3 and later.

node_mem_used_gb

Memory usage

GB

The memory usage of a coordinator node or compute node.

adbpg_master_conn_percent

Coordinator node connection usage

%

The connection usage of the coordinator node, calculated as the number of connections divided by the maximum number of non-superuser connections.

node_disk_iops

Total IOPS

count/s

The total read and write IOPS of a compute node.

node_disk_reads_completed_total_rate

Read IOPS

count/s

The number of read I/O operations completed per second on a compute node.

node_disk_writes_completed_total_rate

Write IOPS

count/s

The number of write I/O operations completed per second on a compute node.

node_disk_read_mb

Read I/O throughput

MB/s

The amount of data read per second on a compute node.

node_disk_writes_mb

Write I/O throughput

MB/s

The amount of data written per second on a compute node.

node_disk_read_await

Average read I/O latency

ms

The average latency of each read I/O operation on a compute node.

node_disk_write_await

Average write I/O latency

ms

The average latency of each write I/O operation on a compute node.

adbpg_gpu_utilization_gpu

GPU utilization

%

The GPU compute utilization of the instance. Compatible with both EAS and native deployment modes.

adbpg_gpu_utilization_memory

GPU memory utilization

%

The GPU memory utilization of the instance. Compatible with both EAS and native deployment modes.

Serverless mode

You can call the DescribeHealthStatus operation to return the following metric parameters.

Parameter

Metric

Unit

Description

adbpg_status

Instance health status

N/A

  • critical: A coordinator node or compute node is unavailable. In this case, this metric is marked in red in the console.

  • healthy: All nodes are available. In this case, this metric is marked in green in the console.

adbpg_connection_status

Instance connection status

N/A

The connection health status of the instance. Valid values:

  • critical: The instance connection usage is greater than 95%. In this case, this metric is marked in red in the console.

  • warning: The instance connection usage is greater than 90% and less than or equal to 95%. In this case, this metric is marked in yellow in the console.

  • healthy: The instance connection usage is less than or equal to 90%. In this case, this metric is marked in green in the console.

Note

The instance connection usage is the maximum connection usage of all coordinator nodes and compute nodes.

node_master_status

Coordinator node health status

N/A

The health status of coordinator nodes. Valid values:

  • critical: A coordinator node is unavailable. In this case, this metric is marked in red in the console.

  • healthy: All coordinator nodes are available. In this case, this metric is marked in green in the console.

node_master_connection_status

Coordinator node connection status

N/A

The connection status of coordinator nodes. Valid values:

  • critical: The connection usage of coordinator nodes is greater than or equal to 95%. In this case, this metric is marked in red in the console.

  • warning: The connection usage of coordinator nodes is greater than or equal to 90% and less than 95%. In this case, this metric is marked in yellow in the console.

  • healthy: The connection usage of coordinator nodes is less than 90%. In this case, this metric is marked in green in the console.

Note

The coordinator node connection usage is the maximum connection usage of all coordinator nodes.

node_segment_connection_status

Compute node connection status

N/A

The connection status of compute nodes. Valid values:

  • critical: The connection usage of compute nodes is greater than or equal to 95%. In this case, this metric is marked in red in the console.

  • warning: The connection usage of compute nodes is greater than or equal to 90% and less than 95%. In this case, this metric is marked in yellow in the console.

  • healthy: The connection usage of compute nodes is less than 90%. In this case, this metric is marked in green in the console.

Note

The compute node connection usage is the maximum connection usage of all compute nodes.

adbpg_master_disk_usage_percent_max

Maximum storage usage of coordinator nodes

%

The status corresponding to the maximum storage usage of all coordinator nodes. Valid values:

  • critical: The storage usage of coordinator nodes is greater than or equal to 90%. In this case, the instance is locked.

  • warning: The storage usage of coordinator nodes is greater than or equal to 70% and less than 90%.

  • healthy: The storage usage of coordinator nodes is less than 70%.

You can call the DescribeDBClusterPerformance operation to return the following metric parameters.

Parameter

Metric

Unit

Description

adbpg_acu_used

ACU usage

AnalyticDB compute unit (ACU)

The amount of computing resources that are used by the instance.

adbpg_segment_cnt

Number of compute nodes

N/A

The number of compute nodes that are collected per hour.

adbpg_instance_disk_used_mb

Instance storage used

MB

The amount of Object Storage Service (OSS) storage space that is used by the instance.

node_master_connection_count

Number of coordinator node connections

N/A

The number of connections to coordinator nodes.

node_segment_connection_count

Number of compute node connections

N/A

The number of connections to compute nodes.

node_segment_workfile_used_mb

Temporary disk file size

MB

The size of temporary files that are written to disks.

node_cpu_used_percent

CPU utilization

%

The CPU utilization of coordinator nodes or compute nodes.

node_mem_used_percent

Memory usage

%

The memory usage of coordinator nodes or compute nodes.

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