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Commitbf379ee

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Use a memory context for IVFFlat index scans
1 parente1bc929 commitbf379ee

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2 files changed

+18
-11
lines changed

2 files changed

+18
-11
lines changed

‎src/ivfflat.h‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -260,6 +260,7 @@ typedef struct IvfflatScanOpaqueData
260260
intdimensions;
261261
boolfirst;
262262
Datumvalue;
263+
MemoryContexttmpCtx;
263264

264265
/* Sorting */
265266
Tuplesortstate*sortstate;

‎src/ivfscan.c‎

Lines changed: 17 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -10,10 +10,7 @@
1010
#include"miscadmin.h"
1111
#include"pgstat.h"
1212
#include"storage/bufmgr.h"
13-
14-
#ifdefIVFFLAT_MEMORY
1513
#include"utils/memutils.h"
16-
#endif
1714

1815
#defineGetScanList(ptr) pairingheap_container(IvfflatScanList, ph_node, ptr)
1916
#defineGetScanListConst(ptr) pairingheap_const_container(IvfflatScanList, ph_node, ptr)
@@ -221,7 +218,13 @@ GetScanValue(IndexScanDesc scan)
221218

222219
/* Normalize if needed */
223220
if (so->normprocinfo!=NULL)
221+
{
222+
MemoryContextoldCtx=MemoryContextSwitchTo(so->tmpCtx);
223+
224224
value=IvfflatNormValue(so->typeInfo,so->collation,value);
225+
226+
MemoryContextSwitchTo(oldCtx);
227+
}
225228
}
226229

227230
returnvalue;
@@ -253,6 +256,7 @@ ivfflatbeginscan(Relation index, int nkeys, int norderbys)
253256
intdimensions;
254257
intprobes=ivfflat_probes;
255258
intmaxProbes;
259+
MemoryContextoldCtx;
256260

257261
scan=RelationGetIndexScan(index,nkeys,norderbys);
258262

@@ -292,6 +296,12 @@ ivfflatbeginscan(Relation index, int nkeys, int norderbys)
292296
so->normprocinfo=IvfflatOptionalProcInfo(index,IVFFLAT_NORM_PROC);
293297
so->collation=index->rd_indcollation[0];
294298

299+
so->tmpCtx=AllocSetContextCreate(CurrentMemoryContext,
300+
"Ivfflat scan temporary context",
301+
ALLOCSET_DEFAULT_SIZES);
302+
303+
oldCtx=MemoryContextSwitchTo(so->tmpCtx);
304+
295305
/* Create tuple description for sorting */
296306
so->tupdesc=CreateTemplateTupleDesc(2);
297307
TupleDescInitEntry(so->tupdesc, (AttrNumber)1,"distance",FLOAT8OID,-1,0);
@@ -316,6 +326,8 @@ ivfflatbeginscan(Relation index, int nkeys, int norderbys)
316326
so->listIndex=0;
317327
so->lists=palloc(maxProbes*sizeof(IvfflatScanList));
318328

329+
MemoryContextSwitchTo(oldCtx);
330+
319331
scan->opaque=so;
320332

321333
returnscan;
@@ -377,8 +389,6 @@ ivfflatgettuple(IndexScanDesc scan, ScanDirection dir)
377389
IvfflatBench("GetScanItems",GetScanItems(scan,value));
378390
so->first= false;
379391
so->value=value;
380-
381-
/* TODO clean up if we allocated a new value */
382392
}
383393

384394
while (!tuplesort_gettupleslot(so->sortstate, true, false,so->mslot,NULL))
@@ -405,14 +415,10 @@ ivfflatendscan(IndexScanDesc scan)
405415
{
406416
IvfflatScanOpaqueso= (IvfflatScanOpaque)scan->opaque;
407417

408-
pairingheap_free(so->listQueue);
409-
pfree(so->listPages);
418+
/* Free any temporary files */
410419
tuplesort_end(so->sortstate);
411-
FreeAccessStrategy(so->bas);
412-
FreeTupleDesc(so->tupdesc);
413-
pfree(so->lists);
414420

415-
/* TODO Free vslot and mslot without freeing TupleDesc */
421+
MemoryContextDelete(so->tmpCtx);
416422

417423
pfree(so);
418424
scan->opaque=NULL;

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