datid | oid | OID of the database that the backend is connected to |
dbname | name | Name of the database that the backend is connected to |
schemaname | text | Schema name |
nodename | text | Database process name |
username | name | Username used for connecting to the backend |
application_name | text | Name of the application connected to the backend |
client_addr | inet | IP address of the client connected to the backend. If this column is null, it indicates either the client is connected via a Unix socket on the server or this is an internal process, such as autovacuum |
client_hostname | text | Host name of the connected client, as reported by a reverse DNS lookup of client_addr. This column will be non-null only for IP connections and only when log_hostname is enabled |
client_port | integer | TCP port number that the client uses for communication with this backend (-1 if a Unix socket is used) |
query_band | text | Job type, which is specified by the GUC parameter query_band. The default value is a null string |
pid | bigint | Thread ID of the backend |
block_time | bigint | Block time before the statement is executed (unit: ms) |
start_time | timestamp with time zone | Time when the statement starts to be executed |
duration | bigint | Duration that a statement has been executed (unit: ms) |
estimate_total_time | bigint | Estimated execution time of the statement (unit: ms) |
estimate_left_time | bigint | Estimated remaining execution time of the statement (unit: ms) |
enqueue | text | Resource status in workload management |
resource_pool | name | Resource pool used by the user |
control_group | text | Cgroup used by the statement |
estimate_memory | integer | Estimated memory used by the statement (unit: MB) |
min_peak_memory | integer | Minimum memory peak of the statement across the database nodes (unit: MB) |
max_peak_memory | integer | Maximum memory peak of the statement across the database nodes (unit: MB) |
average_peak_memory | integer | Average memory usage during statement execution (unit: MB) |
memory_skew_percent | integer | Memory usage skew of the statement among the database nodes |
spill_info | text | Information about statement spill to the database nodes - None: The statement has not been spilled to disks on the database nodes.
- All: The statement has been spilled to disks on the database nodes.
- [a:b]: The statement has been spilled to disks on a of b database nodes
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min_spill_size | integer | Minimum spilled data among database nodes when a spill occurs (unit: MB) (default value: 0) |
max_spill_size | integer | Maximum spilled data among database nodes when a spill occurs (unit: MB) (default value: 0) |
average_spill_size | integer | Average spilled data among database nodes when a spill occurs (unit: MB) (default value: 0) |
spill_skew_percent | integer | Database node spill skew when a spill occurs |
min_dn_time | bigint | Minimum execution time of the statement across the database nodes (unit: ms) |
max_dn_time | bigint | Maximum execution time of the statement across the database nodes (unit: ms) |
average_dn_time | bigint | Average execution time of the statement across the database nodes (unit: ms) |
dntime_skew_percent | integer | Execution time skew of the statement among the database nodes |
min_cpu_time | bigint | Minimum CPU time of the statement across the database nodes (unit: ms) |
max_cpu_time | bigint | Maximum CPU time of the statement across the database nodes (unit: ms) |
total_cpu_time | bigint | Total CPU time of the statement across the database nodes (unit: ms) |
cpu_skew_percent | integer | CPU time skew of the statement among the database nodes |
min_peak_iops | integer | Minimum IOPS peak of the statement across the database nodes. It is counted by ones in a column-store table and by ten thousands in a row-store table |
max_peak_iops | integer | Maximum IOPS peak of the statement across the database nodes. It is counted by ones in a column-store table and by ten thousands in a row-store table |
average_peak_iops | integer | Average IOPS peak of the statement across the database nodes. It is counted by ones in a column-store table and by ten thousands in a row-store table |
iops_skew_percent | integer | I/O skew of the statement among the database nodes |
warning | text | Warning. The following warnings are displayed: - Spill file size large than 256MB
- Broadcast size large than 100MB
- Early spill
- Spill times is greater than 3
- Spill on memory adaptive
- Hash table conflict
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queryid | bigint | Internal query ID used for statement execution |
query | text | Statement being executed |
query_plan | text | Execution plan of the statement |
node_group | text | Logical openGauss of the user running the statement |
top_cpu_dn | text | Top N CPU usage |
top_mem_dn | text | Top N memory usage |