--- trunk/lib/WebPAC/Input.pm	2006/10/10 10:57:59	757
+++ trunk/lib/WebPAC/Input.pm	2006/10/25 15:56:44	760
@@ -112,32 +112,6 @@
 
 	$self->{'encoding'} ||= 'ISO-8859-2';
 
-	# running with low_mem flag? well, use DBM::Deep then.
-	if ($self->{'low_mem'}) {
-		$log->info("running with low_mem which impacts performance (<32 Mb memory usage)");
-
-		my $db_file = "data.db";
-
-		if (-e $db_file) {
-			unlink $db_file or $log->logdie("can't remove '$db_file' from last run");
-			$log->debug("removed '$db_file' from last run");
-		}
-
-		require DBM::Deep;
-
-		my $db = new DBM::Deep $db_file;
-
-		$log->logdie("DBM::Deep error: $!") unless ($db);
-
-		if ($db->error()) {
-			$log->logdie("can't open '$db_file' under low_mem: ",$db->error());
-		} else {
-			$log->debug("using file '$db_file' for DBM::Deep");
-		}
-
-		$self->{'db'} = $db;
-	}
-
 	$self ? return $self : return undef;
 }
 
@@ -285,6 +259,38 @@
 
 	$log->info("processing $self->{size}/$size records [$from_rec-$to_rec] convert $code_page -> $self->{encoding}", $self->{stats} ? ' [stats]' : '');
 
+	# turn on low_mem for databases with more than 100000 records!
+	if (! $self->{low_mem} && $size > 100000) {
+		$log->warn("Using on-disk storage instead of memory for input data. This will affect performance.");
+		$self->{low_mem}++;
+	}
+
+	# running with low_mem flag? well, use DBM::Deep then.
+	if ($self->{'low_mem'}) {
+		$log->info("running with low_mem which impacts performance (<32 Mb memory usage)");
+
+		my $db_file = "data.db";
+
+		if (-e $db_file) {
+			unlink $db_file or $log->logdie("can't remove '$db_file' from last run");
+			$log->debug("removed '$db_file' from last run");
+		}
+
+		require DBM::Deep;
+
+		my $db = new DBM::Deep $db_file;
+
+		$log->logdie("DBM::Deep error: $!") unless ($db);
+
+		if ($db->error()) {
+			$log->logdie("can't open '$db_file' under low_mem: ",$db->error());
+		} else {
+			$log->debug("using file '$db_file' for DBM::Deep");
+		}
+
+		$self->{'db'} = $db;
+	}
+
 	# read database
 	for (my $pos = $from_rec; $pos <= $to_rec; $pos++) {