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Commitea268cd

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Add macros to make AllocSetContextCreate() calls simpler and safer.
I found that half a dozen (nearly 5%) of our AllocSetContextCreate callshad typos in the context-sizing parameters. While none of these led toespecially significant problems, they did create minor inefficiencies,and it's now clear that expecting people to copy-and-paste those callsaccurately is not a great idea. Let's reduce the risk of future errorsby introducing single macros that encapsulate the common use-cases.Three such macros are enough to cover all but two special-purpose contexts;those two calls can be left as-is, I think.While this patch doesn't in itself improve matters for third-partyextensions, it doesn't break anything for them either, and they cangradually adopt the simplified notation over time.In passing, change TopMemoryContext to use the default allocationparameters. Formerly it could only be extended 8K at a time. That wasprobably reasonable when this code was written; but nowadays we createmany more contexts than we did then, so that it's not unusual to have acouple hundred K in TopMemoryContext, even without considering variousdubious code that sticks other things there. There seems no good reasonnot to let it use growing blocks like most other contexts.Back-patch to 9.6, mostly because that's still close enough to HEAD thatit's easy to do so, and keeping the branches in sync can be expected toavoid some future back-patching pain. The bugs fixed by these changesdon't seem to be significant enough to justify fixing them further back.Discussion: <21072.1472321324@sss.pgh.pa.us>
1 parent26fa446 commitea268cd

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99 files changed

+206
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lines changed

‎contrib/bloom/blinsert.c‎

Lines changed: 2 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -130,9 +130,7 @@ blbuild(Relation heap, Relation index, IndexInfo *indexInfo)
130130
initBloomState(&buildstate.blstate,index);
131131
buildstate.tmpCtx=AllocSetContextCreate(CurrentMemoryContext,
132132
"Bloom build temporary context",
133-
ALLOCSET_DEFAULT_MINSIZE,
134-
ALLOCSET_DEFAULT_INITSIZE,
135-
ALLOCSET_DEFAULT_MAXSIZE);
133+
ALLOCSET_DEFAULT_SIZES);
136134
initCachedPage(&buildstate);
137135

138136
/* Do the heap scan */
@@ -204,9 +202,7 @@ blinsert(Relation index, Datum *values, bool *isnull,
204202

205203
insertCtx=AllocSetContextCreate(CurrentMemoryContext,
206204
"Bloom insert temporary context",
207-
ALLOCSET_DEFAULT_MINSIZE,
208-
ALLOCSET_DEFAULT_INITSIZE,
209-
ALLOCSET_DEFAULT_MAXSIZE);
205+
ALLOCSET_DEFAULT_SIZES);
210206

211207
oldCtx=MemoryContextSwitchTo(insertCtx);
212208

‎contrib/dblink/dblink.c‎

Lines changed: 1 addition & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -980,9 +980,7 @@ materializeQueryResult(FunctionCallInfo fcinfo,
980980
/* Create short-lived memory context for data conversions */
981981
sinfo.tmpcontext=AllocSetContextCreate(CurrentMemoryContext,
982982
"dblink temporary context",
983-
ALLOCSET_DEFAULT_MINSIZE,
984-
ALLOCSET_DEFAULT_INITSIZE,
985-
ALLOCSET_DEFAULT_MAXSIZE);
983+
ALLOCSET_DEFAULT_SIZES);
986984

987985
/* execute query, collecting any tuples into the tuplestore */
988986
res=storeQueryResult(&sinfo,conn,sql);

‎contrib/file_fdw/file_fdw.c‎

Lines changed: 1 addition & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -1061,9 +1061,7 @@ file_acquire_sample_rows(Relation onerel, int elevel,
10611061
*/
10621062
tupcontext=AllocSetContextCreate(CurrentMemoryContext,
10631063
"file_fdw temporary context",
1064-
ALLOCSET_DEFAULT_MINSIZE,
1065-
ALLOCSET_DEFAULT_INITSIZE,
1066-
ALLOCSET_DEFAULT_MAXSIZE);
1064+
ALLOCSET_DEFAULT_SIZES);
10671065

10681066
/* Prepare for sampling rows */
10691067
reservoir_init_selection_state(&rstate,targrows);

‎contrib/pg_trgm/trgm_regexp.c‎

Lines changed: 1 addition & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -529,9 +529,7 @@ createTrgmNFA(text *text_re, Oid collation,
529529
*/
530530
tmpcontext=AllocSetContextCreate(CurrentMemoryContext,
531531
"createTrgmNFA temporary context",
532-
ALLOCSET_DEFAULT_MINSIZE,
533-
ALLOCSET_DEFAULT_INITSIZE,
534-
ALLOCSET_DEFAULT_MAXSIZE);
532+
ALLOCSET_DEFAULT_SIZES);
535533
oldcontext=MemoryContextSwitchTo(tmpcontext);
536534

537535
/*

‎contrib/postgres_fdw/postgres_fdw.c‎

Lines changed: 5 additions & 15 deletions
Original file line numberDiff line numberDiff line change
@@ -1315,14 +1315,10 @@ postgresBeginForeignScan(ForeignScanState *node, int eflags)
13151315
/* Create contexts for batches of tuples and per-tuple temp workspace. */
13161316
fsstate->batch_cxt=AllocSetContextCreate(estate->es_query_cxt,
13171317
"postgres_fdw tuple data",
1318-
ALLOCSET_DEFAULT_MINSIZE,
1319-
ALLOCSET_DEFAULT_INITSIZE,
1320-
ALLOCSET_DEFAULT_MAXSIZE);
1318+
ALLOCSET_DEFAULT_SIZES);
13211319
fsstate->temp_cxt=AllocSetContextCreate(estate->es_query_cxt,
13221320
"postgres_fdw temporary data",
1323-
ALLOCSET_SMALL_MINSIZE,
1324-
ALLOCSET_SMALL_INITSIZE,
1325-
ALLOCSET_SMALL_MAXSIZE);
1321+
ALLOCSET_SMALL_SIZES);
13261322

13271323
/*
13281324
* Get info we'll need for converting data fetched from the foreign server
@@ -1695,9 +1691,7 @@ postgresBeginForeignModify(ModifyTableState *mtstate,
16951691
/* Create context for per-tuple temp workspace. */
16961692
fmstate->temp_cxt=AllocSetContextCreate(estate->es_query_cxt,
16971693
"postgres_fdw temporary data",
1698-
ALLOCSET_SMALL_MINSIZE,
1699-
ALLOCSET_SMALL_INITSIZE,
1700-
ALLOCSET_SMALL_MAXSIZE);
1694+
ALLOCSET_SMALL_SIZES);
17011695

17021696
/* Prepare for input conversion of RETURNING results. */
17031697
if (fmstate->has_returning)
@@ -2294,9 +2288,7 @@ postgresBeginDirectModify(ForeignScanState *node, int eflags)
22942288
/* Create context for per-tuple temp workspace. */
22952289
dmstate->temp_cxt=AllocSetContextCreate(estate->es_query_cxt,
22962290
"postgres_fdw temporary data",
2297-
ALLOCSET_SMALL_MINSIZE,
2298-
ALLOCSET_SMALL_INITSIZE,
2299-
ALLOCSET_SMALL_MAXSIZE);
2291+
ALLOCSET_SMALL_SIZES);
23002292

23012293
/* Prepare for input conversion of RETURNING results. */
23022294
if (dmstate->has_returning)
@@ -3481,9 +3473,7 @@ postgresAcquireSampleRowsFunc(Relation relation, int elevel,
34813473
astate.anl_cxt=CurrentMemoryContext;
34823474
astate.temp_cxt=AllocSetContextCreate(CurrentMemoryContext,
34833475
"postgres_fdw temporary data",
3484-
ALLOCSET_SMALL_MINSIZE,
3485-
ALLOCSET_SMALL_INITSIZE,
3486-
ALLOCSET_SMALL_MAXSIZE);
3476+
ALLOCSET_SMALL_SIZES);
34873477

34883478
/*
34893479
* Get the connection to use. We do the remote access as the table's

‎contrib/sepgsql/uavc.c‎

Lines changed: 2 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -498,13 +498,11 @@ sepgsql_avc_init(void)
498498
intrc;
499499

500500
/*
501-
* All the avc stuff shall be allocatedon avc_mem_cxt
501+
* All the avc stuff shall be allocatedin avc_mem_cxt
502502
*/
503503
avc_mem_cxt=AllocSetContextCreate(TopMemoryContext,
504504
"userspace access vector cache",
505-
ALLOCSET_DEFAULT_MINSIZE,
506-
ALLOCSET_DEFAULT_INITSIZE,
507-
ALLOCSET_DEFAULT_MAXSIZE);
505+
ALLOCSET_DEFAULT_SIZES);
508506
memset(avc_slots,0,sizeof(avc_slots));
509507
avc_num_caches=0;
510508
avc_lru_hint=0;

‎contrib/test_decoding/test_decoding.c‎

Lines changed: 1 addition & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -102,9 +102,7 @@ pg_decode_startup(LogicalDecodingContext *ctx, OutputPluginOptions *opt,
102102
data=palloc0(sizeof(TestDecodingData));
103103
data->context=AllocSetContextCreate(ctx->context,
104104
"text conversion context",
105-
ALLOCSET_DEFAULT_MINSIZE,
106-
ALLOCSET_DEFAULT_INITSIZE,
107-
ALLOCSET_DEFAULT_MAXSIZE);
105+
ALLOCSET_DEFAULT_SIZES);
108106
data->include_xids= true;
109107
data->include_timestamp= false;
110108
data->skip_empty_xacts= false;

‎src/backend/access/brin/brin.c‎

Lines changed: 4 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -165,9 +165,7 @@ brininsert(Relation idxRel, Datum *values, bool *nulls,
165165
bdesc=brin_build_desc(idxRel);
166166
tupcxt=AllocSetContextCreate(CurrentMemoryContext,
167167
"brininsert cxt",
168-
ALLOCSET_DEFAULT_MINSIZE,
169-
ALLOCSET_DEFAULT_INITSIZE,
170-
ALLOCSET_DEFAULT_MAXSIZE);
168+
ALLOCSET_DEFAULT_SIZES);
171169
oldcxt=MemoryContextSwitchTo(tupcxt);
172170
}
173171

@@ -347,9 +345,7 @@ bringetbitmap(IndexScanDesc scan, TIDBitmap *tbm)
347345
*/
348346
perRangeCxt=AllocSetContextCreate(CurrentMemoryContext,
349347
"bringetbitmap cxt",
350-
ALLOCSET_DEFAULT_MINSIZE,
351-
ALLOCSET_DEFAULT_INITSIZE,
352-
ALLOCSET_DEFAULT_MAXSIZE);
348+
ALLOCSET_DEFAULT_SIZES);
353349
oldcxt=MemoryContextSwitchTo(perRangeCxt);
354350

355351
/*
@@ -856,9 +852,7 @@ brin_build_desc(Relation rel)
856852

857853
cxt=AllocSetContextCreate(CurrentMemoryContext,
858854
"brin desc cxt",
859-
ALLOCSET_SMALL_INITSIZE,
860-
ALLOCSET_SMALL_MINSIZE,
861-
ALLOCSET_SMALL_MAXSIZE);
855+
ALLOCSET_SMALL_SIZES);
862856
oldcxt=MemoryContextSwitchTo(cxt);
863857
tupdesc=RelationGetDescr(rel);
864858

@@ -1169,9 +1163,7 @@ union_tuples(BrinDesc *bdesc, BrinMemTuple *a, BrinTuple *b)
11691163
/* Use our own memory context to avoid retail pfree */
11701164
cxt=AllocSetContextCreate(CurrentMemoryContext,
11711165
"brin union",
1172-
ALLOCSET_DEFAULT_MINSIZE,
1173-
ALLOCSET_DEFAULT_INITSIZE,
1174-
ALLOCSET_DEFAULT_MAXSIZE);
1166+
ALLOCSET_DEFAULT_SIZES);
11751167
oldcxt=MemoryContextSwitchTo(cxt);
11761168
db=brin_deform_tuple(bdesc,b);
11771169
MemoryContextSwitchTo(oldcxt);

‎src/backend/access/brin/brin_tuple.c‎

Lines changed: 1 addition & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -367,9 +367,7 @@ brin_new_memtuple(BrinDesc *brdesc)
367367

368368
dtup->bt_context=AllocSetContextCreate(CurrentMemoryContext,
369369
"brin dtuple",
370-
ALLOCSET_DEFAULT_MINSIZE,
371-
ALLOCSET_DEFAULT_INITSIZE,
372-
ALLOCSET_DEFAULT_MAXSIZE);
370+
ALLOCSET_DEFAULT_SIZES);
373371
returndtup;
374372
}
375373

‎src/backend/access/common/printtup.c‎

Lines changed: 1 addition & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -135,9 +135,7 @@ printtup_startup(DestReceiver *self, int operation, TupleDesc typeinfo)
135135
*/
136136
myState->tmpcontext=AllocSetContextCreate(CurrentMemoryContext,
137137
"printtup",
138-
ALLOCSET_DEFAULT_MINSIZE,
139-
ALLOCSET_DEFAULT_INITSIZE,
140-
ALLOCSET_DEFAULT_MAXSIZE);
138+
ALLOCSET_DEFAULT_SIZES);
141139

142140
if (PG_PROTOCOL_MAJOR(FrontendProtocol)<3)
143141
{

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