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Add query cancellation capabilities in pgbench init phase 

This can be useful to stop data generation happening on the server for
long-running queries caused by large scale factors.  This cannot happen
by default as data is generated on the client, but it is possible to
control the initialization steps of pgbench to do that.

Reported-by: Fujii Masao
Author: Fabien Coelho
Discussion: https://postgr.es/m/alpine.DEB.2.21.1910311939430.27369@lancre
Discussion: https://postgr.es/m/CAHGQGwHWEyTXxZh46qgFY8a2bDF_EYeUdp3+_Hy=qLZSzwVPKg@mail.gmail.com
This commit is contained in:
Michael Paquier 2019-12-02 11:42:28 +09:00
parent a4fd3aa719
commit 1d468b9ad8
1 changed files with 8 additions and 0 deletions
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8
src/bin/pgbench/pgbench.c
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@ -59,6 +59,7 @@
#include "common/int.h"
#include "common/logging.h"
#include "fe_utils/cancel.h"
#include "fe_utils/conditional.h"
#include "getopt_long.h"
#include "libpq-fe.h"
@ -3894,6 +3895,9 @@ initGenerateDataClientSide(PGconn *con)
exit(1);
}
if (CancelRequested)
break;
/*
* If we want to stick with the original logging, print a message each
* 100k inserted rows.
@ -4109,6 +4113,9 @@ runInitSteps(const char *initialize_steps)
if ((con = doConnect()) == NULL)
exit(1);
setup_cancel_handler(NULL);
SetCancelConn(con);
for (step = initialize_steps; *step != '\0'; step++)
{
instr_time start;
@ -4176,6 +4183,7 @@ runInitSteps(const char *initialize_steps)
}
fprintf(stderr, "done in %.2f s (%s).\n", run_time, stats.data);
ResetCancelConn();
PQfinish(con);
termPQExpBuffer(&stats);
}