Don't use patterns in order to save RAM

src/index/Index.cpp

@@ -903,12 +903,17 @@ void Index::createFromOnDiskIndex(const string& onDiskBase) {
   LOG(INFO) << "total vocab size is " << _totalVocabularySize << std::endl;
   _PSO.loadFromDisk(_onDiskBase);
   _POS.loadFromDisk(_onDiskBase);
+  // Do not load OPS, OSP, SPO, and SOP. Note that this isn't very harmful,
+  // since they are only needed for SPARQL queries with a variable at a
+  // predicate position, which are rare.
   //_OPS.loadFromDisk(_onDiskBase);
   //_OSP.loadFromDisk(_onDiskBase);
   //_SPO.loadFromDisk(_onDiskBase);
   //_SOP.loadFromDisk(_onDiskBase);
 
-  if (_usePatterns) {
+  // Do not load the patterns. For some reason, this requires too much RAM
+  // for UniProt (it shouldn't).
+  if (false) {  // _usePatterns) {
     // Read the pattern info from the patterns file
     std::string patternsFilePath = _onDiskBase + ".index.patterns";
     ad_utility::File patternsFile;