database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-12-21 05:21:08 +03:00
Code Activity

Propagate sort instrumentation from workers back to leader.

Browse Source 
Up until now, when parallel query was used, no details about the
sort method or space used by the workers were available; details
were shown only for any sorting done by the leader.  Fix that.

Commit 1177ab1dab forced the test case
added by commit 1f6d515a67 to run
without parallelism; now that we have this infrastructure, allow
that again, with a little tweaking to make it pass with and without
force_parallel_mode.

Robert Haas and Tom Lane

Discussion: http://postgr.es/m/CA+Tgmoa2VBZW6S8AAXfhpHczb=Rf6RqQ2br+zJvEgwJ0uoD_tQ@mail.gmail.com
This commit is contained in:
Robert Haas
2017-08-29 13:22:49 -04:00
parent 3452dc5240
commit bf11e7ee2e
9 changed files with 342 additions and 87 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
src/include/utils/tuplesort.h
View File

@@ -31,6 +31,34 @@
*/
typedef struct Tuplesortstate Tuplesortstate;
/*
* Data structures for reporting sort statistics. Note that
* TuplesortInstrumentation can't contain any pointers because we
* sometimes put it in shared memory.
*/
typedef enum
{
SORT_TYPE_STILL_IN_PROGRESS = 0,
SORT_TYPE_TOP_N_HEAPSORT,
SORT_TYPE_QUICKSORT,
SORT_TYPE_EXTERNAL_SORT,
SORT_TYPE_EXTERNAL_MERGE
} TuplesortMethod;
typedef enum
{
SORT_SPACE_TYPE_DISK,
SORT_SPACE_TYPE_MEMORY
} TuplesortSpaceType;
typedef struct TuplesortInstrumentation
{
TuplesortMethod sortMethod; /* sort algorithm used */
TuplesortSpaceType spaceType; /* type of space spaceUsed represents */
long spaceUsed; /* space consumption, in kB */
} TuplesortInstrumentation;
/*
* We provide multiple interfaces to what is essentially the same code,
* since different callers have different data to be sorted and want to
@@ -107,9 +135,9 @@ extern bool tuplesort_skiptuples(Tuplesortstate *state, int64 ntuples,
extern void tuplesort_end(Tuplesortstate *state);
extern void tuplesort_get_stats(Tuplesortstate *state,
const char **sortMethod,
const char **spaceType,
long *spaceUsed);
TuplesortInstrumentation *stats);
extern const char *tuplesort_method_name(TuplesortMethod m);
extern const char *tuplesort_space_type_name(TuplesortSpaceType t);
extern int tuplesort_merge_order(int64 allowedMem);