Updated on 2023-10-23 GMT+08:00

GS_SLOW_QUERY_INFO (Discarded)

GS_SLOW_QUERY_INFO displays the slow query information that has been dumped on the current node. Data is dumped from the kernel to this system catalog. If enable_resource_record is set to on, the system imports the query information from the kernel to GS_WLM_SESSION_QUERY_INFO_ALL every 3 minutes. This operation occupies storage space and affects performance. You can check GS_SLOW_QUERY_INFO to view the slow query information that has been dumped. This view has been discarded in this version.

Table 1 GS_SLOW_QUERY_INFO columns

Name

Type

Description

dbname

text

Database name

schemaname

text

Schema name

nodename

text

Node name

username

text

Username

queryid

bigint

Normalization ID

query

text

Query statement

start_time

timestamp with time zone

Execution start time

finish_time

timestamp with time zone

Execution end time

duration

bigint

Execution duration (unit: ms)

query_plan

text

Plan inforation

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 cache loading times

n_blocks_hit

bigint

Cache hits

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)

net_send_time

bigint

Network time (unit: μs)

data_io_time

bigint

I/O time (unit: μs)