database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-17 17:02:08 +03:00
Code Activity

Log all statements from a sample of transactions

Browse Source 
This is useful to obtain a view of the different transaction types in an
application, regardless of the durations of the statements each runs.

Author: Adrien Nayrat
Reviewed-by: Masahiko Sawada, Hayato Kuroda, Andres Freund
This commit is contained in:
Alvaro Herrera
2019-04-03 18:43:59 -03:00
parent d8c0bd9fef
commit 799e220346
7 changed files with 60 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/backend/tcop/postgres.c
View File

@ -2194,6 +2194,8 @@ check_log_statement(List *stmt_list)
* check_log_duration
* Determine whether current command's duration should be logged.
* If log_statement_sample_rate < 1.0, log only a sample.
* We also check if this statement in this transaction must be logged
* (regardless of its duration).
*
* Returns:
* 0 if no logging is needed
@ -2209,7 +2211,7 @@ check_log_statement(List *stmt_list)
int
check_log_duration(char *msec_str, bool was_logged)
{
if (log_duration || log_min_duration_statement >= 0)
if (log_duration || log_min_duration_statement >= 0 || xact_is_sampled)
{
long secs;
int usecs;
@ -2243,11 +2245,11 @@ check_log_duration(char *msec_str, bool was_logged)
(log_statement_sample_rate == 1 ||
random() <= log_statement_sample_rate * MAX_RANDOM_VALUE);
if ((exceeded && in_sample) || log_duration)
if ((exceeded && in_sample) || log_duration || xact_is_sampled)
{
snprintf(msec_str, 32, "%ld.%03d",
secs * 1000 + msecs, usecs % 1000);
if (exceeded && !was_logged)
if ((exceeded || xact_is_sampled) && !was_logged)
return 2;
else
return 1;