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Experimental code to measure memory consumed by database schemas and prepared statements.

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FossilOrigin-Name: 9aa30342f4de4eff630520ea8e07ad253d3f0877
This commit is contained in:
dan
2010-07-24 11:28:28 +00:00
parent 5419ee5f2f
commit d46def77db
14 changed files with 430 additions and 97 deletions
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54
src/build.c
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@@ -347,30 +347,12 @@ Index *sqlite3FindIndex(sqlite3 *db, const char *zName, const char *zDb){
*/
static void freeIndex(sqlite3 *db, Index *p){
#ifndef SQLITE_OMIT_ANALYZE
sqlite3DeleteIndexSamples(p);
sqlite3DeleteIndexSamples(db, p);
#endif
sqlite3DbFree(db, p->zColAff);
sqlite3DbFree(db, p);
}
/*
** Remove the given index from the index hash table, and free
** its memory structures.
**
** The index is removed from the database hash tables but
** it is not unlinked from the Table that it indexes.
** Unlinking from the Table must be done by the calling function.
*/
static void sqlite3DeleteIndex(sqlite3 *db, Index *p){
Index *pOld;
const char *zName = p->zName;
pOld = sqlite3HashInsert(&p->pSchema->idxHash, zName,
sqlite3Strlen30(zName), 0);
assert( pOld==0 || pOld==p );
freeIndex(db, p);
}
/*
** For the index called zIdxName which is found in the database iDb,
** unlike that index from its Table then remove the index from
@@ -468,9 +450,10 @@ void sqlite3CommitInternalChanges(sqlite3 *db){
}
/*
** Clear the column names from a table or view.
** Delete memory allocated for the column names of a table or view (the
** Table.aCol[] array).
*/
static void sqliteResetColumnNames(sqlite3 *db, Table *pTable){
static void sqliteDeleteColumnNames(sqlite3 *db, Table *pTable){
int i;
Column *pCol;
assert( pTable!=0 );
@@ -484,8 +467,6 @@ static void sqliteResetColumnNames(sqlite3 *db, Table *pTable){
}
sqlite3DbFree(db, pTable->aCol);
}
pTable->aCol = 0;
pTable->nCol = 0;
}
/*
@@ -500,21 +481,24 @@ static void sqliteResetColumnNames(sqlite3 *db, Table *pTable){
void sqlite3DeleteTable(sqlite3 *db, Table *pTable){
Index *pIndex, *pNext;
if( pTable==0 ) return;
assert( !pTable || pTable->nRef>0 );
/* Do not delete the table until the reference count reaches zero. */
pTable->nRef--;
if( pTable->nRef>0 ){
return;
}
assert( pTable->nRef==0 );
if( !pTable ) return;
if( ((!db || db->pnBytesFreed==0) && (--pTable->nRef)>0) ) return;
/* Delete all indices associated with this table
*/
/* Delete all indices associated with this table. */
for(pIndex = pTable->pIndex; pIndex; pIndex=pNext){
pNext = pIndex->pNext;
assert( pIndex->pSchema==pTable->pSchema );
sqlite3DeleteIndex(db, pIndex);
if( !db || db->pnBytesFreed==0 ){
char *zName = pIndex->zName;
TESTONLY ( Index *pOld = ) sqlite3HashInsert(
&pIndex->pSchema->idxHash, zName, sqlite3Strlen30(zName), 0
);
assert( pOld==pIndex || pOld==0 );
}
freeIndex(db, pIndex);
}
/* Delete any foreign keys attached to this table. */
@@ -522,7 +506,7 @@ void sqlite3DeleteTable(sqlite3 *db, Table *pTable){
/* Delete the Table structure itself.
*/
sqliteResetColumnNames(db, pTable);
sqliteDeleteColumnNames(db, pTable);
sqlite3DbFree(db, pTable->zName);
sqlite3DbFree(db, pTable->zColAff);
sqlite3SelectDelete(db, pTable->pSelect);
@@ -1817,7 +1801,9 @@ static void sqliteViewResetAll(sqlite3 *db, int idx){
for(i=sqliteHashFirst(&db->aDb[idx].pSchema->tblHash); i;i=sqliteHashNext(i)){
Table *pTab = sqliteHashData(i);
if( pTab->pSelect ){
sqliteResetColumnNames(db, pTab);
sqliteDeleteColumnNames(db, pTab);
pTab->aCol = 0;
pTab->nCol = 0;
}
}
DbClearProperty(db, idx, DB_UnresetViews);