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Provide FDW query time profiles #3

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Provide FDW query time profiles #3

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021a374
Provide FDW query timing on DEBUG
pramsey Jan 8, 2016
146d29f
Reformat to tabs
pramsey Jan 8, 2016
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17 changes: 17 additions & 0 deletions contrib/postgres_fdw/postgres_fdw.c
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,9 @@
#include "utils/rel.h"
#include "utils/sampling.h"

#include <sys/time.h>
#include <time.h>

PG_MODULE_MAGIC;

/* Default CPU cost to start up a foreign query. */
Expand Down Expand Up @@ -154,6 +157,9 @@ typedef struct PgFdwScanState
int fetch_ct_2; /* Min(# of fetches done, 2) */
bool eof_reached; /* true if last fetch reached EOF */

/* Timing */
struct timeval start_time;

/* working memory contexts */
MemoryContext batch_cxt; /* context holding current batch of tuples */
MemoryContext temp_cxt; /* context for per-tuple temporary data */
Expand Down Expand Up @@ -1019,7 +1025,10 @@ postgresIterateForeignScan(ForeignScanState *node)
* cursor on the remote side.
*/
if (!fsstate->cursor_exists)
{
gettimeofday(&(fsstate->start_time), NULL);
create_cursor(node);
}

/*
* Get some more tuples, if we've run out.
Expand Down Expand Up @@ -1116,7 +1125,15 @@ postgresEndForeignScan(ForeignScanState *node)

/* Close the cursor if open, to prevent accumulation of cursors */
if (fsstate->cursor_exists)
{
struct timeval end_time;
double secs;
gettimeofday(&end_time, NULL);
secs = 1000 * end_time.tv_sec + end_time.tv_usec/1000.0;
secs -= 1000 * (fsstate->start_time).tv_sec + (fsstate->start_time).tv_usec/1000.0;
elog(DEBUG1, "FDW Query Duration: %.3lf ms", secs);
close_cursor(fsstate->conn, fsstate->cursor_number);
}

/* Release remote connection */
ReleaseConnection(fsstate->conn);
Expand Down