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Revert sampling patch for EXPLAIN ANALYZE; it turns out to be too unreliable

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because node timing is much less predictable than the patch expects.  I kept
the API change for InstrStopNode, however.
This commit is contained in:
Tom Lane
2006-06-09 19:30:56 +00:00
parent 9143144935
commit 5de0cbdf0c
3 changed files with 30 additions and 179 deletions
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6
src/include/executor/instrument.h
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@@ -6,7 +6,7 @@
*
* Copyright (c) 2001-2006, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/include/executor/instrument.h,v 1.15 2006/05/30 19:24:25 tgl Exp $
* $PostgreSQL: pgsql/src/include/executor/instrument.h,v 1.16 2006/06/09 19:30:56 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -57,14 +57,10 @@ typedef struct Instrumentation
{
/* Info about current plan cycle: */
bool running; /* TRUE if we've completed first tuple */
bool sampling; /* Are we sampling in current iteration? */
instr_time starttime; /* Start time of current iteration of node */
instr_time counter; /* Accumulated runtime for this node */
double firsttuple; /* Time for first tuple of this cycle */
double tuplecount; /* Tuples emitted so far this cycle */
double itercount; /* Plan node iterations this cycle */
double samplecount; /* Iterations in which we sampled runtime */
double nextsample; /* Next itercount to sample at */
/* Accumulated statistics across all completed cycles: */
double startup; /* Total startup time (in seconds) */
double total; /* Total total time (in seconds) */