GS_WLM_SESSION_STATISTICS

datid

oid

OID of the database this backend is connected to

dbname

name

Name of the database the backend is connected to

schemaname

text

Schema name

nodename

text

Name of the CN where the statement is executed

username

name

User name used for connecting to the backend

application_name

text

Name of the application that is connected to the backend

client_addr

inet

IP address of the client connected to this backend. If this column is null, it indicates either that the client is connected via a Unix socket on the server machine or that 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 only be non-null 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, or -1 if a Unix socket is used

query_band

text

Job type, which is specified by the GUC parameter query_band parameter. The default value is a null string.

pid

bigint

Process ID of the backend

block_time

bigint

Block time before the statement is executed. The unit is ms.

start_time

timestamp with time zone

Time when the statement starts to be executed

duration

bigint

For how long a statement has been executing. The unit is ms.

estimate_total_time

bigint

Estimated execution time of a statement. The unit is ms.

estimate_left_time

bigint

Estimated remaining time of statement execution. The unit is ms.

enqueue

text

Workload management resource status

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. The unit is MB.

min_peak_memory

integer

Minimum memory peak of a statement across all DNs. The unit is MB.

max_peak_memory

integer

Maximum memory peak of a statement across all DNs. The unit is MB.

average_peak_memory

integer

Average memory usage during statement execution. The unit is MB.

memory_skew_percent

integer

Memory usage skew of a statement among DNs.

spill_info

text

Statement spill information on all DNs.

None indicates that the statement has not been flushed to disks on any DNs.

All indicates that the statement has been spilled to disks on every DN.

[a:b] indicates that the statement has been spilled to disks on a of b DNs.

min_spill_size

integer

Minimum spilled data among all DNs when a spill occurs. The unit is MB. Default value: 0.

max_spill_size

integer

Maximum spilled data among all DNs when a spill occurs. The unit is MB. Default value: 0.

average_spill_size

integer

Average spilled data among all DNs when a spill occurs. The unit is MB. Default value: 0.

spill_skew_percent

integer

DN spill skew when a spill occurs

min_dn_time

bigint

Minimum execution time of a statement across all DNs. The unit is ms.

max_dn_time

bigint

Maximum execution time of a statement across all DNs. The unit is ms.

average_dn_time

bigint

Average execution time of a statement across all DNs. The unit is ms.

dntime_skew_percent

integer

Execution time skew of a statement among DNs.

min_cpu_time

bigint

Minimum CPU time of a statement across all DNs. The unit is ms.

max_cpu_time

bigint

Maximum CPU time of a statement across all DNs. The unit is ms.

total_cpu_time

bigint

Total CPU time of a statement across all DNs. The unit is ms.

cpu_skew_percent

integer

CPU time skew of a statement among DNs.

min_peak_iops

integer

Minimum I/O peak of a statement on all DNs (times/s in column-store tables and 10,000 times/s in row-store tables). This function is not enabled in cluster version 8.1.3. Therefore, you are not advised to refer to this field to analyze memory problems.

max_peak_iops

integer

Maximum I/O peak of a statement on all DNs (times/s in column-store tables and 10,000 times/s in row-store tables). This function is not enabled in cluster version 8.1.3. Therefore, you are not advised to refer to this field to analyze memory problems.

average_peak_iops

integer

Average I/O peak of a statement on all DNs (times/s in column-store tables and 10,000 times/s in row-store tables). This function is not enabled in cluster version 8.1.3. Therefore, you are not advised to refer to this field to analyze memory problems.

iops_skew_percent

integer

I/O skew across DNs. This function is not enabled in the 8.1.3 cluster version. You are not advised to analyze memory problems by referring to this field.

warning

text

Warning. The following warnings and warnings related to SQL self-diagnosis tuning 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

queryid

bigint

Internal query ID used for statement execution

query

text

Statement that is being executed

query_plan

text

Execution plan of a statement

node_group

text

Logical cluster of the user running the statement