Merge branch 'devel' of https://github.com/arangodb/arangodb into devel

CHANGELOG

@@ -52,10 +52,11 @@ edge attribute `label`.
 v3.1.5 (XXXX-XX-XX)
 -------------------
 
+* fixed issue #2218
+
 * fixed issue #2217
 
 * Foxx router.get/post/etc handler argument can no longer accidentally omitted
-* fixed issue #2217
 
 
 v3.1.4 (2016-12-08)

Documentation/DocuBlocks/Rest/Collections/JSA_get_api_collection_figures.md

@@ -99,40 +99,25 @@ The number of compactor files.
 @RESTSTRUCT{fileSize,collection_figures_compactors,integer,required,int64}
 The total filesize of all compactor files (in bytes).
 
-@RESTSTRUCT{shapefiles,collection_figures,object,required,collection_figures_shapefiles}
-**deprecated**
+@RESTSTRUCT{readcache,collection_figures,object,required,collection_figures_readcache}
 
-@RESTSTRUCT{count,collection_figures_shapefiles,integer,required,int64}
-The number of shape files. This value is deprecated and kept for compatibility reasons only.
-The value will always be 0 since ArangoDB 2.0 and higher.
+@RESTSTRUCT{count,collection_figures_readcache,integer,required,int64}
+The number of revisions of this collection stored in the document revisions cache.
 
-@RESTSTRUCT{fileSize,collection_figures_shapefiles,integer,required,int64}
-The total filesize of the shape files. This value is deprecated and kept
-for compatibility reasons only. The value will always be 0 in ArangoDB 2.0 and higher.
+@RESTSTRUCT{size,collection_figures_readcache,integer,required,int64}
+The memory used for storing the revisions of this collection in the document 
+revisions cache (in bytes). This figure does not include the document data but 
+only mappings from document revision ids to cache entry locations.
 
-@RESTSTRUCT{shapes,collection_figures,object,required,collection_figures_shapes}
-@RESTSTRUCT{count,collection_figures_shapes,integer,required,int64}
-The total number of shapes used in the collection. This includes shapes
-that are not in use anymore. Shapes that are contained
-in the write-ahead log only are not reported in this figure.
+@RESTSTRUCT{revisions,collection_figures,object,required,collection_figures_revisions}
 
-@RESTSTRUCT{size,collection_figures_shapes,integer,required,int64}
-The total size of all shapes (in bytes). This includes
-shapes that are not in use anymore. Shapes that are contained in the
-write-ahead log only are not reported in this figure.
+@RESTSTRUCT{count,collection_figures_revisions,integer,required,int64}
+The number of revisions of this collection managed by the storage engine.
 
-@RESTSTRUCT{attributes,collection_figures,object,required,collection_figures_attributes}
-@RESTSTRUCT{count,collection_figures_attributes,integer,required,int64}
-The total number of attributes used in the
-collection. Note: the value includes data of attributes that are not in use
-anymore. Attributes that are contained in the write-ahead log only are
-not reported in this figure.
-
-@RESTSTRUCT{size,collection_figures_attributes,integer,required,int64}
-The total size of the attribute data (in bytes).
-Note: the value includes data of attributes that are not in use anymore.
-Attributes that are contained in the write-ahead log only are not
-reported in this figure.
+@RESTSTRUCT{size,collection_figures_revisions,integer,required,int64}
+The memory used for storing the revisions of this collection in the storage 
+engine (in bytes). This figure does not include the document data but only mappings 
+from document revision ids to storage engine datafile positions.
 
 @RESTSTRUCT{indexes,collection_figures,object,required,collection_figures_indexes}
 @RESTSTRUCT{count,collection_figures_indexes,integer,required,int64}

Documentation/DocuBlocks/collectionFigures.md

@@ -28,28 +28,19 @@ memory.
 * *compactors.count*: The number of compactor files.
 * *compactors.fileSize*: The total filesize of the compactor files
   (in bytes).
-* *shapefiles.count*: The number of shape files. This value is
-  deprecated and kept for compatibility reasons only. The value will always
-  be 0 since ArangoDB 2.0 and higher.
-* *shapefiles.fileSize*: The total filesize of the shape files. This
-  value is deprecated and kept for compatibility reasons only. The value will
-  always be 0 in ArangoDB 2.0 and higher.
-* *shapes.count*: The total number of shapes used in the collection.
-  This includes shapes that are not in use anymore. Shapes that are contained
-  in the write-ahead log only are not reported in this figure.
-* *shapes.size*: The total size of all shapes (in bytes). This includes
-  shapes that are not in use anymore. Shapes that are contained in the
-  write-ahead log only are not reported in this figure.
-* *attributes.count*: The total number of attributes used in the
-  collection. Note: the value includes data of attributes that are not in use
-  anymore. Attributes that are contained in the write-ahead log only are
-  not reported in this figure.
-* *attributes.size*: The total size of the attribute data (in bytes).
-  Note: the value includes data of attributes that are not in use anymore.
-  Attributes that are contained in the write-ahead log only are not 
-  reported in this figure.
+* *readCache.count*: The number of revisions of this collection stored
+  in the document revisions cache.
+* *readCache.size*: The memory used for storing the revisions 
+  of this collection in the document revisions cache (in bytes). This 
+  figure does not include the document data but only mappings from
+  document revision ids to cache entry locations.
+* *revisions.count*: The number of revisions of this collection managed
+  by the storage engine.
+* *revisions.size*: The memory used for storing the revisions 
+  of this collection in the storage engine (in bytes). This figure
+  does not include the document data but only mappings from
+  document revision ids to storage engine datafile positions.
 * *indexes.count*: The total number of indexes defined for the
-  collection, including the pre-defined indexes (e.g. primary index).
 * *indexes.size*: The total memory allocated for indexes in bytes.
 * *maxTick*: The tick of the last marker that was stored in a journal
   of the collection. This might be 0 if the collection does not yet have

arangod/FulltextIndex/fulltext-index.cpp

@@ -36,7 +36,13 @@
 /// @brief use padding for pointers in binary data
 ////////////////////////////////////////////////////////////////////////////////
 
+#ifdef __arm__
+// must properly align memory on ARM architecture to prevent
+// unaligned memory accesses
+#define FULLTEXT_PADDING 1
+#else
 #undef FULLTEXT_PADDING
+#endif
 
 ////////////////////////////////////////////////////////////////////////////////
 /// @brief maximum length of an indexed word in bytes
@@ -210,6 +216,7 @@ void DumpNode(const node_t* const node, uint32_t level) {
 
 static inline size_t Padding(uint32_t numEntries) {
 #ifdef FULLTEXT_PADDING
+  size_t const PAD = 8;
   size_t offset = sizeof(uint8_t) +                    // numAllocated
                   sizeof(uint8_t) +                    // numUsed
                   (sizeof(node_char_t) * numEntries);  // followerKeys

arangod/GeneralServer/HttpCommTask.cpp

@@ -66,6 +66,7 @@ HttpCommTask::HttpCommTask(EventLoop loop, GeneralServer* server,
   _protocol = "http";
 
   connectionStatisticsAgentSetHttp();
+  
   auto agent = std::make_unique<RequestStatisticsAgent>(true);
   agent->acquire();
   MUTEX_LOCKER(lock, _agentsMutex);

arangod/GeneralServer/HttpCommTask.h

@@ -9,7 +9,7 @@ namespace arangodb {
 class HttpRequest;
 
 namespace rest {
-class HttpCommTask : public GeneralCommTask {
+class HttpCommTask final : public GeneralCommTask {
  public:
   static size_t const MaximalHeaderSize;
   static size_t const MaximalBodySize;

arangod/RestServer/RevisionCacheFeature.cpp

@@ -50,19 +50,19 @@ RevisionCacheFeature::RevisionCacheFeature(ApplicationServer* server)
   requiresElevatedPrivileges(false);
   startsAfter("WorkMonitor");
 
-
-  if (TRI_PhysicalMemory != 0) {
+  if (TRI_PhysicalMemory > 1024 * 1024 * 1024) {
     // reset target size to a fraction of the available memory
-    _targetSize = static_cast<decltype(_targetSize)>(TRI_PhysicalMemory * 0.75);
+    _targetSize = TRI_PhysicalMemory - (1024 * 1024 * 1024);
+    _targetSize *= 0.4; // 40 %
   }
 }
 
 void RevisionCacheFeature::collectOptions(std::shared_ptr<ProgramOptions> options) {
   options->addSection("database", "Configure the database");
   
-  options->addOption("--database.revision-cache-chunk-size", "chunk size for the document revision cache",
+  options->addOption("--database.revision-cache-chunk-size", "chunk size (in bytes) for the document revisions cache",
                      new UInt32Parameter(&_chunkSize));
-  options->addOption("--database.revision-cache-target-size", "total target size for the document revision cache",
+  options->addOption("--database.revision-cache-target-size", "total target size (in bytes) for the document revisions cache",
                      new UInt64Parameter(&_targetSize));
 }
 

arangod/Scheduler/AcceptorTcp.h

@@ -26,7 +26,7 @@
 #include "Scheduler/Acceptor.h"
 
 namespace arangodb {
-class AcceptorTcp: public Acceptor {
+class AcceptorTcp final : public Acceptor {
   public:
     AcceptorTcp(boost::asio::io_service& ioService, Endpoint* endpoint)
     : Acceptor(ioService, endpoint),

arangod/Scheduler/AcceptorUnixDomain.h

@@ -26,7 +26,7 @@
 #include "Scheduler/Acceptor.h"
 
 namespace arangodb {
-class AcceptorUnixDomain: public Acceptor {
+class AcceptorUnixDomain final : public Acceptor {
   public:
     AcceptorUnixDomain(boost::asio::io_service& ioService, Endpoint* endpoint)
     : Acceptor(ioService, endpoint),

arangod/Scheduler/JobQueue.cpp

@@ -31,7 +31,7 @@
 using namespace arangodb;
 
 namespace {
-class JobQueueThread : public Thread {
+class JobQueueThread final : public Thread {
  public:
   JobQueueThread(JobQueue* server, boost::asio::io_service* ioService)
       : Thread("JobQueueThread"), _jobQueue(server), _ioService(ioService) {}

arangod/Scheduler/JobQueue.h

@@ -49,7 +49,7 @@ class JobQueue {
   void start();
   void beginShutdown();
 
-  int64_t queueSize(size_t i) { return _queuesSize[i]; }
+  int64_t queueSize(size_t i) const { return _queuesSize[i]; }
 
   bool queue(size_t i, std::unique_ptr<Job> job) {
     if (i >= SYSTEM_QUEUE_SIZE) {

arangod/Scheduler/Socket.h

@@ -44,10 +44,50 @@ template <typename T>
 bool doSslHandshake(T& socket) {
   boost::system::error_code ec;
 
-  do {
-    ec.assign(boost::system::errc::success, boost::system::generic_category());
-    socket.handshake(boost::asio::ssl::stream_base::handshake_type::server, ec);
-  } while (ec.value() == boost::asio::error::would_block);
+  uint64_t tries = 0;
+  double start = 0.0;
+
+  while (true) {
+    ec.assign(boost::system::errc::success,
+	boost::system::generic_category());
+    socket.handshake(
+	boost::asio::ssl::stream_base::handshake_type::server, ec);
+
+    if (ec.value() != boost::asio::error::would_block) {
+      break;
+    }
+
+    // got error EWOULDBLOCK and need to try again
+    ++tries;
+
+    // following is a helpless fix for connections hanging in the handshake
+    // phase forever. we've seen this happening when the underlying peer
+    // connection was closed during the handshake.
+    // with the helpless fix, handshakes will be aborted it they take longer 
+    // than x seconds. a proper fix is to make the handshake run asynchronously
+    // and somehow signal it that the connection got closed. apart from that
+    // running it asynchronously will not block the scheduler thread as it 
+    // does now. anyway, even the helpless fix allows self-healing of busy
+    // scheduler threads after a network failure
+    if (tries == 1) {
+      // capture start time of handshake
+      start = TRI_microtime();
+    } else if (tries % 50 == 0) {
+      // check if we have spent more than x seconds handshaking and then abort
+      TRI_ASSERT(start != 0.0);
+
+      if (TRI_microtime() - start >= 3) {
+	ec.assign(boost::asio::error::connection_reset,
+	    boost::system::generic_category());
+	LOG_TOPIC(DEBUG, Logger::COMMUNICATION) << "forcefully shutting down connection after wait time";
+	break;
+      } else {
+	usleep(10000);
+      }
+    }
+
+    // next iteration
+  }
 
   if (ec) {
     LOG_TOPIC(ERR, Logger::COMMUNICATION)
@@ -88,7 +128,7 @@ class Socket {
       : _ioService(ioService),
         _context(std::move(context)),
         _encrypted(encrypted) {}
-  Socket(Socket&& that) = default;
+  Socket(Socket&& that) = delete;
   virtual ~Socket() {}
 
   virtual void close() = 0;

arangod/Scheduler/SocketTcp.h

@@ -28,7 +28,7 @@
 #include <boost/asio/ip/tcp.hpp>
 
 namespace arangodb {
-class SocketTcp: public Socket {
+class SocketTcp final : public Socket {
   public:
     SocketTcp(boost::asio::io_service& ioService,
            boost::asio::ssl::context&& context, bool encrypted)
@@ -61,7 +61,7 @@ class SocketTcp: public Socket {
 
     // mop: these functions actually only access the underlying socket. The _sslSocket is
     // actually just an additional layer around the socket. These low level functions
-    // aceess the _socket only and it is ok that they are not implemented for _sslSocket in
+    // access the _socket only and it is ok that they are not implemented for _sslSocket in
     // the children
     void shutdownReceive() override;
     void shutdownReceive(boost::system::error_code& ec) override;

arangod/Scheduler/SocketUnixDomain.h

@@ -30,7 +30,7 @@
 using namespace arangodb::basics;
 
 namespace arangodb {
-class SocketUnixDomain: public Socket {
+class SocketUnixDomain final : public Socket {
   public:
     SocketUnixDomain(boost::asio::io_service& ioService, boost::asio::ssl::context&& context)
         : Socket(ioService, std::move(context), false),

arangod/StorageEngine/MMFilesCollection.cpp

@@ -28,6 +28,7 @@
 #include "Basics/StaticStrings.h"
 #include "Basics/VelocyPackHelper.h"
 #include "Basics/WriteLocker.h"
+#include "Basics/process-utils.h"
 #include "Indexes/PrimaryIndex.h"
 #include "Logger/Logger.h"
 #include "RestServer/DatabaseFeature.h"
@@ -312,7 +313,6 @@ int64_t MMFilesCollection::initialCount() const {
 
 void MMFilesCollection::updateCount(int64_t count) {
   _initialCount = count;
-  _revisionsCache.sizeHint(count);
 }
   
 /// @brief closes an open collection
@@ -898,6 +898,11 @@ void MMFilesCollection::figures(std::shared_ptr<arangodb::velocypack::Builder>&
   builder->add("count", VPackValue(_compactors.size()));
   builder->add("fileSize", VPackValue(sizeCompactors));
   builder->close(); // compactors
+  
+  builder->add("revisions", VPackValue(VPackValueType::Object));
+  builder->add("count", VPackValue(_revisionsCache.size()));
+  builder->add("size", VPackValue(_revisionsCache.memoryUsage()));
+  builder->close(); // revisions
 }
 
 /// @brief iterate over a vector of datafiles and pick those with a specific
@@ -1075,6 +1080,7 @@ int MMFilesCollection::iterateMarkersOnLoad(arangodb::Transaction* trx) {
   OpenIteratorState openState(_logicalCollection, trx);
 
   if (_initialCount != -1) {
+    _revisionsCache.sizeHint(_initialCount);
     _logicalCollection->sizeHint(trx, _initialCount);
     openState._initialCount = _initialCount;
   }
@@ -1085,7 +1091,7 @@ int MMFilesCollection::iterateMarkersOnLoad(arangodb::Transaction* trx) {
   };
 
   iterateDatafiles(cb);
-
+    
   LOG(TRACE) << "found " << openState._documents << " document markers, " 
              << openState._deletions << " deletion markers for collection '" << _logicalCollection->name() << "'";
   

arangod/StorageEngine/MMFilesRevisionsCache.cpp

@@ -69,10 +69,25 @@ MMFilesDocumentPosition MMFilesRevisionsCache::lookup(TRI_voc_rid_t revisionId)
 void MMFilesRevisionsCache::sizeHint(int64_t hint) {
   WRITE_LOCKER(locker, _lock);
   if (hint > 256) {
-    _positions.resize(nullptr, static_cast<size_t>(hint * 1.1));
+    _positions.resize(nullptr, static_cast<size_t>(hint));
   }
 }
 
+size_t MMFilesRevisionsCache::size() {
+  READ_LOCKER(locker, _lock);
+  return _positions.size();
+}
+
+size_t MMFilesRevisionsCache::capacity() {
+  READ_LOCKER(locker, _lock);
+  return _positions.capacity();
+}
+
+size_t MMFilesRevisionsCache::memoryUsage() {
+  READ_LOCKER(locker, _lock);
+  return _positions.memoryUsage();
+}
+
 void MMFilesRevisionsCache::clear() {
   WRITE_LOCKER(locker, _lock);
   _positions.truncate([](MMFilesDocumentPosition&) { return true; });

arangod/StorageEngine/MMFilesRevisionsCache.h

@@ -41,6 +41,9 @@ class MMFilesRevisionsCache {
   
  public:
   void sizeHint(int64_t hint);
+  size_t size();
+  size_t capacity();
+  size_t memoryUsage();
   void clear();
   MMFilesDocumentPosition lookup(TRI_voc_rid_t revisionId) const;
   void insert(TRI_voc_rid_t revisionId, uint8_t const* dataptr, TRI_voc_fid_t fid, bool isInWal, bool shouldLock);

arangod/VocBase/CollectionRevisionsCache.cpp

@@ -92,9 +92,24 @@ void CollectionRevisionsCache::clear() {
   _readCache.clear();
 }
 
+size_t CollectionRevisionsCache::size() {
+  READ_LOCKER(locker, _lock);
+  return _revisions.size();
+}
+
+size_t CollectionRevisionsCache::memoryUsage() {
+  READ_LOCKER(locker, _lock);
+  return _revisions.memoryUsage();
+}
+
+size_t CollectionRevisionsCache::chunksMemoryUsage() {
+  READ_LOCKER(locker, _lock);
+  return _readCache.chunksMemoryUsage();
+}
+
 void CollectionRevisionsCache::sizeHint(int64_t hint) {
   if (hint > 256) {
-    _revisions.resize(nullptr, static_cast<size_t>(hint * 1.1));
+    _revisions.resize(nullptr, static_cast<size_t>(hint));
   }
 }
   

arangod/VocBase/CollectionRevisionsCache.h

@@ -53,6 +53,9 @@ class CollectionRevisionsCache {
   void clear();
 
   void sizeHint(int64_t hint);
+  size_t size();
+  size_t memoryUsage();
+  size_t chunksMemoryUsage();
 
   bool allowInvalidation() const {
     return _allowInvalidation.load();

arangod/VocBase/LogicalCollection.cpp

@@ -23,6 +23,7 @@
 
 #include "LogicalCollection.h"
 
+#include "Aql/QueryCache.h"
 #include "Basics/Barrier.h"
 #include "Basics/ReadLocker.h"
 #include "Basics/StringUtils.h"
@@ -31,7 +32,7 @@
 #include "Basics/ThreadPool.h"
 #include "Basics/VelocyPackHelper.h"
 #include "Basics/WriteLocker.h"
-#include "Aql/QueryCache.h"
+#include "Basics/process-utils.h"
 #include "Cluster/ClusterInfo.h"
 #include "Cluster/ClusterMethods.h"
 #include "Cluster/FollowerInfo.h"
@@ -1223,7 +1224,7 @@ std::shared_ptr<arangodb::velocypack::Builder> LogicalCollection::figures() {
     }
   } else {
     builder->openObject();
-
+   
     // add index information
     size_t sizeIndexes = getPhysical()->memory();
     size_t numIndexes = 0;
@@ -1231,7 +1232,7 @@ std::shared_ptr<arangodb::velocypack::Builder> LogicalCollection::figures() {
       sizeIndexes += static_cast<size_t>(idx->memory());
       ++numIndexes;
     }
-
+    
     builder->add("indexes", VPackValue(VPackValueType::Object));
     builder->add("count", VPackValue(numIndexes));
     builder->add("size", VPackValue(sizeIndexes));
@@ -1255,6 +1256,9 @@ std::shared_ptr<arangodb::velocypack::Builder> LogicalCollection::figures() {
     }
 
     if (lastCompactionStatus != nullptr) {
+      if (lastCompactionStamp == 0.0) {
+        lastCompactionStamp = TRI_microtime();
+      }
       struct tm tb;
       time_t tt = static_cast<time_t>(lastCompactionStamp);
       TRI_gmtime(tt, &tb);
@@ -1265,6 +1269,13 @@ std::shared_ptr<arangodb::velocypack::Builder> LogicalCollection::figures() {
     builder->add("message", VPackValue(lastCompactionStatus));
     builder->add("time", VPackValue(&lastCompactionStampString[0]));
     builder->close(); // compactionStatus
+    
+    if (_revisionsCache) { 
+      builder->add("readCache", VPackValue(VPackValueType::Object));
+      builder->add("count", VPackValue(_revisionsCache->size()));
+      builder->add("size", VPackValue(_revisionsCache->memoryUsage()));
+      builder->close(); // readCache
+    }
 
     // add engine-specific figures
     getPhysical()->figures(builder);

arangod/VocBase/ReadCache.cpp

@@ -39,7 +39,9 @@ uint8_t* ReadCachePosition::vpack() noexcept {
 
 ReadCache::ReadCache(RevisionCacheChunkAllocator* allocator, CollectionRevisionsCache* collectionCache) 
         : _allocator(allocator), _collectionCache(collectionCache), 
-          _writeChunk(nullptr) {}
+          _writeChunk(nullptr) {
+  TRI_ASSERT(_allocator != nullptr);
+}
 
 ReadCache::~ReadCache() {
   try {
@@ -49,6 +51,10 @@ ReadCache::~ReadCache() {
   }
 }
 
+size_t ReadCache::chunksMemoryUsage() {
+  return _allocator->totalAllocated();
+}
+
 // clear all chunks currently in use. this is a fast-path deletion without checks
 void ReadCache::clear() {
   closeWriteChunk();

arangod/VocBase/ReadCache.h

@@ -112,6 +112,8 @@ union RevisionCacheValue {
   RevisionCacheValue& operator=(RevisionCacheValue const& other) = delete;
   RevisionCacheValue& operator=(RevisionCacheValue&& other) = delete;
 };
+
+static_assert(sizeof(RevisionCacheValue) == 16, "invalid size for RevisionCacheValue");
   
 struct RevisionCacheEntry {
   TRI_voc_rid_t revisionId;
@@ -180,11 +182,15 @@ struct RevisionCacheEntry {
 
 };
 
+static_assert(sizeof(RevisionCacheEntry) == 24, "invalid size for RevisionCacheEntry");
+
 class ReadCache {
  public: 
   ReadCache(RevisionCacheChunkAllocator* allocator, CollectionRevisionsCache* collectionCache);
   ~ReadCache();
 
+  size_t chunksMemoryUsage();
+
   // clear all chunks currently in use. this is a fast-path deletion without checks
   void clear();
 

arangod/Wal/LogfileManager.cpp

@@ -86,7 +86,6 @@ static inline uint32_t MaxSlots() { return 1024 * 1024 * 16; }
 // create the logfile manager
 LogfileManager::LogfileManager(ApplicationServer* server)
     : ApplicationFeature(server, "LogfileManager"),
-      _recoverState(nullptr),
       _allowWrites(false),  // start in read-only mode
       _hasFoundLastTick(false),
       _inRecovery(true),
@@ -130,7 +129,6 @@ LogfileManager::~LogfileManager() {
 
   _barriers.clear();
 
-  delete _recoverState;
   delete _slots;
 
   for (auto& it : _logfiles) {
@@ -297,7 +295,7 @@ void LogfileManager::start() {
   
   // initialize some objects
   _slots = new Slots(this, _numberOfSlots, 0);
-  _recoverState = new RecoverState(_ignoreRecoveryErrors);
+  _recoverState.reset(new RecoverState(_ignoreRecoveryErrors));
 
   TRI_ASSERT(!_allowWrites);
 
@@ -405,6 +403,9 @@ bool LogfileManager::open() {
   // remove usage locks for databases and collections
   _recoverState->releaseResources();
 
+  // not needed anymore
+  _recoverState.reset();
+
   // write the current state into the shutdown file
   writeShutdownInfo(false);
 
@@ -2107,7 +2108,7 @@ int LogfileManager::inspectLogfiles() {
 
     // update the tick statistics
     if (!TRI_IterateDatafile(df, &RecoverState::InitialScanMarker,
-                             static_cast<void*>(_recoverState))) {
+                             static_cast<void*>(_recoverState.get()))) {
       std::string const logfileName = logfile->filename();
       LOG(WARN) << "WAL inspection failed when scanning logfile '"
                 << logfileName << "'";

arangod/Wal/LogfileManager.h

@@ -457,7 +457,7 @@ class LogfileManager final : public application_features::ApplicationFeature {
   std::string _databasePath;
 
   // state during recovery
-  RecoverState* _recoverState;
+  std::unique_ptr<RecoverState> _recoverState;
 
   bool _allowOversizeEntries = true;
   bool _useMLock = false;

js/server/modules/@arangodb/foxx/templates/setup.js.tmpl

@@ -8,7 +8,7 @@ for (const localName of documentCollections) {
   if (!db._collection(qualifiedName)) {
     db._createDocumentCollection(qualifiedName);
   } else if (module.context.isProduction) {
-    console.warn(`collection <%= '$' %>{qualifiedName} already exists. Leaving it untouched.`)
+    console.debug(`collection <%= '$' %>{qualifiedName} already exists. Leaving it untouched.`)
   }
 }
 
@@ -17,6 +17,6 @@ for (const localName of edgeCollections) {
   if (!db._collection(qualifiedName)) {
     db._createEdgeCollection(qualifiedName);
   } else if (module.context.isProduction) {
-    console.warn(`collection <%= '$' %>{qualifiedName} already exists. Leaving it untouched.`)
+    console.debug(`collection <%= '$' %>{qualifiedName} already exists. Leaving it untouched.`)
   }
 }

lib/ApplicationFeatures/ApplicationServer.cpp

@@ -25,6 +25,7 @@
 #include "ApplicationFeatures/ApplicationFeature.h"
 #include "ApplicationFeatures/PrivilegeFeature.h"
 #include "Basics/StringUtils.h"
+#include "Basics/process-utils.h"
 #include "Logger/Logger.h"
 #include "ProgramOptions/ArgumentParser.h"
 
@@ -532,6 +533,7 @@ void ApplicationServer::start() {
       feature->start();
       feature->state(FeatureState::STARTED);
       reportFeatureProgress(_state, feature->name());
+      
     } catch (std::exception const& ex) {
       LOG(ERR) << "caught exception during start of feature '" << feature->name()
                << "': " << ex.what() << ". shutting down";

lib/Basics/AssocUnique.h

@@ -349,6 +349,14 @@ class AssocUnique {
     }
     return sum;
   }
+  
+  size_t capacity() const {
+    size_t sum = 0;
+    for (auto& b : _buckets) {
+      sum += static_cast<size_t>(b._nrAlloc);
+    }
+    return sum;
+  }
 
   //////////////////////////////////////////////////////////////////////////////
   /// @brief resizes the hash table

lib/Basics/process-utils.cpp

@@ -472,6 +472,16 @@ static void StartExternalProcess(TRI_external_t* external, bool usePipes) {
   external->_status = TRI_EXT_RUNNING;
 }
 #endif
+      
+void TRI_LogProcessInfoSelf(char const* message) {
+  TRI_process_info_t info = TRI_ProcessInfoSelf();
+
+  if (message == nullptr) {
+    message = "";
+  }
+  
+  LOG_TOPIC(TRACE, Logger::MEMORY) << message << "virtualSize: " << info._virtualSize << ", residentSize: " << info._residentSize << ", numberThreads: " << info._numberThreads;
+}
 
 ////////////////////////////////////////////////////////////////////////////////
 /// @brief converts usec and sec into seconds

lib/Basics/process-utils.h

@@ -125,6 +125,8 @@ struct TRI_external_status_t {
   std::string _errorMessage;
 };
 
+void TRI_LogProcessInfoSelf(char const* message = nullptr);
+
 ////////////////////////////////////////////////////////////////////////////////
 /// @brief converts usec and sec into seconds
 ////////////////////////////////////////////////////////////////////////////////

lib/Logger/LogTopic.cpp

@@ -49,6 +49,7 @@ LogTopic Logger::CONFIG("config");
 LogTopic Logger::DATAFILES("datafiles", LogLevel::INFO);
 LogTopic Logger::GRAPHS("graphs", LogLevel::INFO);
 LogTopic Logger::HEARTBEAT("heartbeat", LogLevel::INFO);
+LogTopic Logger::MEMORY("memory", LogLevel::FATAL);  // suppress
 LogTopic Logger::MMAP("mmap");
 LogTopic Logger::PERFORMANCE("performance", LogLevel::FATAL);  // suppress
 LogTopic Logger::QUERIES("queries", LogLevel::INFO);

lib/Logger/Logger.h

@@ -137,6 +137,7 @@ class Logger {
   static LogTopic DATAFILES;
   static LogTopic GRAPHS;
   static LogTopic HEARTBEAT;
+  static LogTopic MEMORY;
   static LogTopic MMAP;
   static LogTopic PERFORMANCE;
   static LogTopic QUERIES;