STATEMENT

node_name

name

Node name

node_id

integer

Node ID (node_id in pgxc_node)

user_name

name

Username

user_id

oid

OID of the user

unique_sql_id

bigint

ID of the normalized SQL statement

query

text

Normalized SQL statement

Note: The length is controlled by track_activity_query_size.

n_calls

bigint

Number of calls

min_elapse_time

bigint

Minimum execution time of the SQL statement in the kernel (unit: μs)

max_elapse_time

bigint

Maximum execution time of the SQL statement in the kernel (unit: μs)

total_elapse_time

bigint

Total execution time of the SQL statement in the kernel (unit: μs)

n_returned_rows

bigint

Number of rows in the result set returned by the SELECT statement

n_tuples_fetched

bigint

Number of rows randomly scanned

n_tuples_returned

bigint

Number of rows sequentially scanned

n_tuples_inserted

bigint

Number of rows inserted

n_tuples_updated

bigint

Number of rows updated

n_tuples_deleted

bigint

Number of rows deleted

n_blocks_fetched

bigint

Number of buffer block access times

n_blocks_hit

bigint

Number of buffer block hits

n_soft_parse

bigint

Number of soft parsing times. The value of n_soft_parse plus the value of n_hard_parse may be greater than the value of n_calls because the number of subqueries are not counted in the value of n_calls.

n_hard_parse

bigint

Number of hard parsing times. The value of n_soft_parse plus the value of n_hard_parse may be greater than the value of n_calls because the number of subqueries are not counted in the value of n_calls.

db_time

bigint

Valid DB time, which is accumulated if multiple threads are involved (unit: μs)

cpu_time

bigint

CPU time (unit: μs)

execution_time

bigint

Execution time in the executor (unit: μs)

parse_time

bigint

SQL parsing time (unit: μs)

plan_time

bigint

SQL plan generation time (unit: μs)

rewrite_time

bigint

SQL rewriting time (unit: μs)

pl_execution_time

bigint

Execution time of PL/pgSQL (unit: μs)

pl_compilation_time

bigint

Compilation time of PL/pgSQL (unit: μs)

data_io_time

bigint

I/O time (unit: μs)

net_send_info

text

Network status of messages sent through a physical connection, including the time (unit: μs), number of calls, and throughput (unit: byte). In a distributed database, CNs communicate with each other, CNs communicate with customer service ends, and CNs communicate with DNs through physical connections. This column can be used to analyze the network overhead of SQL statements in a distributed system.

Example: {"time":xxx, "n_calls":xxx, "size":xxx}.

net_recv_info

text

Network status of messages received through a physical connection, including the time (unit: μs), number of calls, and throughput (unit: byte). In a distributed database, CNs communicate with each other, CNs communicate with customer service ends, and CNs communicate with DNs through physical connections. This column can be used to analyze the network overhead of SQL statements in a distributed system.

Example: {"time":xxx, "n_calls":xxx, "size":xxx}.

net_stream_send_info

text

Network status of messages sent through a logical connection, including the time (unit: μs), number of calls, and throughput (unit: byte). In a distributed database, DNs of different shards communicate with each other through logical connections. This column can be used to analyze the network overhead of SQL statements in a distributed system.

Example: {"time":xxx, "n_calls":xxx, "size":xxx}.

net_stream_recv_info

text

Network status of messages received through a logical connection, including the time (unit: μs), number of calls, and throughput (unit: byte). In a distributed database, DNs of different shards communicate with each other through logical connections. This column can be used to analyze the network overhead of SQL statements in a distributed system.

Example: {"time":xxx, "n_calls":xxx, "size":xxx}.

last_updated

timestamp with time zone

Last time when the statement was updated

sort_count

bigint

Sorting count

sort_time

bigint

Sorting duration (unit: μs)

sort_mem_used

bigint

Size of work memory used during sorting (unit: KB)

sort_spill_count

bigint

Count of file writing when data is flushed to disks during sorting

sort_spill_size

bigint

File size used when data is flushed to disks during sorting (unit: KB)

hash_count

bigint

Hashing count

hash_time

bigint

Hashing duration (unit: μs)

hash_mem_used

bigint

Size of work memory used during hashing (unit: KB)

hash_spill_count

bigint

Count of file writing when data is flushed to disks during hashing

hash_spill_size

bigint

File size used when data is flushed to disks during hashing (unit: KB)

parent_unique_sql_id

bigint

Unique ID of the parent SQL statement. The value is 0 for a non-stored procedure substatement.