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v2.1

Documentation:v2.1

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SUMMARY_STATEMENT

SUMMARY_STATEMENT obtains all information about execution statements (normalized SQL statements) on the primary database node and other database nodes.

Table 1 SUMMARY_STATEMENT columns

Name Type Description
node_name name Database process name
node_id integer ID of a 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
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
n_hard_parse bigint Number of hard parsing times
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)
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)
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