iphone sqlite3 object allocation memory up but no leaks - iphone

Question

i've been trying to figure out wh. sqy my object allocation keeps rigth up every time i call this function, Instruments reports no leaks but I get a heck of a lot of object coming from
sqlite3_exec --> sqlite3Prepare --> sqlite3Parser --> yy_reduce --> malloc & also a whole bunch from
& from
sqlite3Step --> sqlite3VdbeExec --> sqlite3BtreeInsert --> malloc
I tried solving it by following the suggestions posted here: http://www.iphonedevsdk.com/forum/iphone-sdk-development/7092-sqlite3-database-gobbling-up-memory.html but haven't been able to fix it
ANY HELP is appreciated, my code is below
+(void)getDesignationsInLibrary:(NSString *)library
{
NSAutoreleasePool *localPool = [[NSAutoreleasePool alloc] init];
NSString *dbName = #"s8.sqlite";
NSArray *documentPaths = \
NSSearchPathForDirectoriesInDomains \
(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDir = \
[documentPaths objectAtIndex:0];
NSString *databasePath = \
[documentsDir stringByAppendingPathComponent:dbName];
[[DT sharedDT].designationsInLibrary removeAllObjects];
NSString *sqlString;
for(int i=0;i<[[DT sharedDT].typesInLibrary count];i++)
{
if(sqlite3_open([databasePath UTF8String], &db)==SQLITE_OK)
{
if (sqlite3_exec(db, "PRAGMA CACHE_SIZE=50;", NULL, NULL, NULL) != SQLITE_OK) {
NSAssert1(0, #"Error: failed to set cache size with message '%s'.", sqlite3_errmsg(db));
}
NSMutableString *lib=[NSMutableString stringWithString:library];
[lib appendString:#"-"];
[lib appendString:[[DT sharedDT].typesInLibrary objectAtIndex:i]];
if([DT sharedDT].sortedBy==#"AISC Default")
{
sqlString = [NSString stringWithFormat:#"select DESIGNATION from \"%#\";",lib];
}
else
{
sqlString = [NSString stringWithFormat:#"select DESIGNATION from \"%#\" order by cast(%# as numeric) %#;",lib, [DT sharedDT].sortedBy, [DT sharedDT].sortAscDesc];
}
const char *sql = [sqlString cStringUsingEncoding:NSASCIIStringEncoding];
sqlite3_stmt *selectstmt;
if(sqlite3_prepare_v2(db,sql,-1,&selectstmt, NULL)==SQLITE_OK)
{
while(sqlite3_step(selectstmt)==SQLITE_ROW)
{
[[DT sharedDT].designationsInLibrary addObject:[NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstmt,0)]];
}
sqlite3_finalize(selectstmt);
selectstmt=nil;
}
}
}
sqlite3_close(db);
[localPool release];
}

Answer 1

It seems, that you're opening db on every loop cycle, but close only once, before function exit
So try to change:
}
sqlite3_close(db);
[localPool release];
}
to
sqlite3_close(db);
}
[localPool release];
}
Or even better change:
for(int i=0;i [[DT sharedDT].typesInLibrary count];i++)
{
if(sqlite3_open([databasePath UTF8String], &db)==SQLITE_OK)
{
if (sqlite3_exec(db, "PRAGMA CACHE_SIZE=50;", NULL, NULL, NULL) != SQLITE_OK) {
NSAssert1(0, #"Error: failed to set cache size with message '%s'.", sqlite3_errmsg(db));
}
to:
if(sqlite3_open([databasePath UTF8String], &db)==SQLITE_OK)
{
if (sqlite3_exec(db, "PRAGMA CACHE_SIZE=50;", NULL, NULL, NULL) != SQLITE_OK) {
NSAssert1(0, #"Error: failed to set cache size with message '%s'.", sqlite3_errmsg(db));
}
for(int i=0;i [[DT sharedDT].typesInLibrary count];i++)
{
...
because you're always open the same database

Answer 2

Try invoking sqlite3_exec with:
pragma cache_size=1
Sqlite seems to gobble up memory for caching.