Try to prevent server crashes when re-building the FTS index on huge …

…collections.

Changelog8.html

@@ -62,6 +62,7 @@ <h2><a name="v8.3.0" id="v8.3.0"></a>Version 8.3.0</h2>
 		<li><a href="https://github.com/Logitech/slimserver/pull/767">#767</a> - fix compatibility with standards compliant cometd libraries (thanks lynniemagoo!)</li>
 		<li><a href="https://github.com/Logitech/slimserver-vendor/issues/95">#95</a> - update faad helper binaries to fix a crash when the decoder call fails (thanks ralphy!)</li>
 		<li><a href="https://github.com/Logitech/slimserver/pull/777">#777</a> - When syncing with disconnected player through CLI, random player is synced</li>
+		<li>Prevent a server crash while re-building the fulltext search index with huge collections.</li>
 	</ul>
 	<br />
 

Slim/Plugin/FullTextSearch/Plugin.pm

@@ -476,6 +476,10 @@ sub _rebuildIndex {
 
 	my $dbh = Slim::Schema->dbh;
 
+	# the "max" db memory settings can lead to OOM crashes when run in the server - use smaller cache temporarily
+	# see https://forums.slimdevices.com/showthread.php?116308 (using a 1M track collection...)
+	$dbh->do("PRAGMA cache_size = 20000") if preferences('server')->get('dbhighmem') && !main::SCANNER;
+
 	$scanlog->error("Initialize fulltext table");
 
 	$dbh->do("DROP TABLE IF EXISTS fulltext;") or $scanlog->error($dbh->errstr);
@@ -549,6 +553,9 @@ sub _rebuildIndex {
 	Slim::Schema->forceCommit if main::SCANNER;
 
 	$scanlog->error("Fulltext index build done!");
+
+	# reset cache sizes to system wide settings
+	Slim::Utils::SQLiteHelper->setCacheSize();
 }
 
 sub _createPlaylistItem {