diff --git a/lib/base/filelogger.ti b/lib/base/filelogger.ti
index daaad69707f..f19b7c9d650 100644
--- a/lib/base/filelogger.ti
+++ b/lib/base/filelogger.ti
@@ -26,6 +26,8 @@ namespace icinga
 
 class FileLogger : StreamLogger
 {
+	activation_priority -100;
+
 	[config, required] String path;
 };
 
diff --git a/lib/base/sysloglogger.ti b/lib/base/sysloglogger.ti
index ee639c25bfc..9ca92d637d6 100644
--- a/lib/base/sysloglogger.ti
+++ b/lib/base/sysloglogger.ti
@@ -26,6 +26,8 @@ namespace icinga
 
 class SyslogLogger : Logger
 {
+	activation_priority -100;
+
 	[config] String facility {
 		default {{{ return "LOG_USER"; }}}
 	};
diff --git a/lib/base/type.cpp b/lib/base/type.cpp
index 19f1bb5d943..138269a87ec 100644
--- a/lib/base/type.cpp
+++ b/lib/base/type.cpp
@@ -154,6 +154,11 @@ std::vector<String> Type::GetLoadDependencies() const
 	return std::vector<String>();
 }
 
+int Type::GetActivationPriority() const
+{
+	return 0;
+}
+
 void Type::RegisterAttributeHandler(int fieldId, const AttributeHandler& callback)
 {
 	throw std::runtime_error("Invalid field ID.");
diff --git a/lib/base/type.hpp b/lib/base/type.hpp
index 10b8524fe44..ef8ce6d231a 100644
--- a/lib/base/type.hpp
+++ b/lib/base/type.hpp
@@ -103,6 +103,7 @@ class Type : public Object
 	Value GetField(int id) const override;
 
 	virtual std::vector<String> GetLoadDependencies() const;
+	virtual int GetActivationPriority() const;
 
 	typedef std::function<void (const Object::Ptr&, const Value&)> AttributeHandler;
 	virtual void RegisterAttributeHandler(int fieldId, const AttributeHandler& callback);
diff --git a/lib/checker/checkercomponent.ti b/lib/checker/checkercomponent.ti
index 119e4425255..8d74f1216be 100644
--- a/lib/checker/checkercomponent.ti
+++ b/lib/checker/checkercomponent.ti
@@ -26,6 +26,8 @@ namespace icinga
 
 class CheckerComponent : ConfigObject
 {
+	activation_priority 100;
+
 	[config] int concurrent_checks {
 		get {{{
 			return Application::GetMaxConcurrentChecks();
diff --git a/lib/compat/checkresultreader.ti b/lib/compat/checkresultreader.ti
index 96143bc990f..18b3d0ac4e7 100644
--- a/lib/compat/checkresultreader.ti
+++ b/lib/compat/checkresultreader.ti
@@ -27,6 +27,8 @@ namespace icinga
 
 class CheckResultReader : ConfigObject
 {
+	activation_priority 100;
+
 	[config] String spool_dir {
 		default {{{ return Application::GetLocalStateDir() + "/lib/icinga2/spool/checkresults/"; }}}
 	};
diff --git a/lib/compat/compatlogger.ti b/lib/compat/compatlogger.ti
index c62471a07c6..322236cd848 100644
--- a/lib/compat/compatlogger.ti
+++ b/lib/compat/compatlogger.ti
@@ -27,6 +27,8 @@ namespace icinga
 
 class CompatLogger : ConfigObject
 {
+	activation_priority 100;
+
 	[config] String log_dir {
 		default {{{ return Application::GetLocalStateDir() + "/log/icinga2/compat"; }}}
 	};
diff --git a/lib/compat/externalcommandlistener.ti b/lib/compat/externalcommandlistener.ti
index fe4c433a0bc..baffb7f5111 100644
--- a/lib/compat/externalcommandlistener.ti
+++ b/lib/compat/externalcommandlistener.ti
@@ -27,6 +27,8 @@ namespace icinga
 
 class ExternalCommandListener : ConfigObject
 {
+	activation_priority 100;
+
 	[config] String command_path {
 		default {{{ return Application::GetRunDir() + "/icinga2/cmd/icinga2.cmd"; }}}
 	};
diff --git a/lib/compat/statusdatawriter.ti b/lib/compat/statusdatawriter.ti
index f2d3d579ad7..5ac2969a914 100644
--- a/lib/compat/statusdatawriter.ti
+++ b/lib/compat/statusdatawriter.ti
@@ -27,6 +27,8 @@ namespace icinga
 
 class StatusDataWriter : ConfigObject
 {
+	activation_priority 100;
+
 	[config] String status_path {
 		default {{{ return Application::GetLocalStateDir() + "/cache/icinga2/status.dat"; }}}
 	};
diff --git a/lib/config/configitem.cpp b/lib/config/configitem.cpp
index 289bca67f21..c790f8794eb 100644
--- a/lib/config/configitem.cpp
+++ b/lib/config/configitem.cpp
@@ -602,18 +602,35 @@ bool ConfigItem::ActivateItems(WorkQueue& upq, const std::vector<ConfigItem::Ptr
 	if (!silent)
 		Log(LogInformation, "ConfigItem", "Triggering Start signal for config items");
 
-	for (const ConfigItem::Ptr& item : newItems) {
-		if (!item->m_Object)
-			continue;
+	/* Activate objects in priority order. */
+	std::vector<Type::Ptr> types = Type::GetAllTypes();
 
-		ConfigObject::Ptr object = item->m_Object;
+	std::sort(types.begin(), types.end(), [](const Type::Ptr& a, const Type::Ptr& b) {
+		if (a->GetActivationPriority() < b->GetActivationPriority())
+			return true;
+		return false;
+	});
+
+	for (const Type::Ptr& type : types) {
+		for (const ConfigItem::Ptr& item : newItems) {
+			if (!item->m_Object)
+				continue;
+
+			ConfigObject::Ptr object = item->m_Object;
+			Type::Ptr objectType = object->GetReflectionType();
+
+			if (objectType != type)
+				continue;
 
 #ifdef I2_DEBUG
-		Log(LogDebug, "ConfigItem")
-			<< "Activating object '" << object->GetName() << "' of type '" << object->GetReflectionType()->GetName() << "'";
+			Log(LogDebug, "ConfigItem")
+				<< "Activating object '" << object->GetName() << "' of type '"
+				<< objectType->GetName() << "' with priority '"
+				<< objectType->GetActivationPriority();
 #endif /* I2_DEBUG */
 
-		object->Activate(runtimeCreated);
+			object->Activate(runtimeCreated);
+		}
 	}
 
 	upq.Join();
diff --git a/lib/db_ido_mysql/idomysqlconnection.ti b/lib/db_ido_mysql/idomysqlconnection.ti
index c3449093554..8a70d5668ec 100644
--- a/lib/db_ido_mysql/idomysqlconnection.ti
+++ b/lib/db_ido_mysql/idomysqlconnection.ti
@@ -26,6 +26,8 @@ namespace icinga
 
 class IdoMysqlConnection : DbConnection
 {
+	activation_priority 100;
+
 	[config] String host {
 		default {{{ return "localhost"; }}}
 	};
diff --git a/lib/db_ido_pgsql/idopgsqlconnection.ti b/lib/db_ido_pgsql/idopgsqlconnection.ti
index a4657c0b1ee..ef7cf6ccb2a 100644
--- a/lib/db_ido_pgsql/idopgsqlconnection.ti
+++ b/lib/db_ido_pgsql/idopgsqlconnection.ti
@@ -26,6 +26,8 @@ namespace icinga
 
 class IdoPgsqlConnection : DbConnection
 {
+	activation_priority 100;
+
 	[config] String host {
 		default {{{ return "localhost"; }}}
 	};
diff --git a/lib/livestatus/livestatuslistener.ti b/lib/livestatus/livestatuslistener.ti
index 576c04bfa4b..0742a6fb538 100644
--- a/lib/livestatus/livestatuslistener.ti
+++ b/lib/livestatus/livestatuslistener.ti
@@ -26,6 +26,8 @@ namespace icinga
 {
 
 class LivestatusListener : ConfigObject {
+	activation_priority 100;
+
 	[config] String socket_type {
 		default {{{ return "unix"; }}}
 	};
diff --git a/lib/notification/notificationcomponent.ti b/lib/notification/notificationcomponent.ti
index 00852e6105e..547528d1e5d 100644
--- a/lib/notification/notificationcomponent.ti
+++ b/lib/notification/notificationcomponent.ti
@@ -26,6 +26,8 @@ namespace icinga
 
 class NotificationComponent : ConfigObject
 {
+	activation_priority 100;
+
 	[config] bool enable_ha (EnableHA) {
 		default {{{ return true; }}}
 	};
diff --git a/lib/perfdata/elasticsearchwriter.ti b/lib/perfdata/elasticsearchwriter.ti
index 6961b426409..2bbdd9d6a0c 100644
--- a/lib/perfdata/elasticsearchwriter.ti
+++ b/lib/perfdata/elasticsearchwriter.ti
@@ -7,6 +7,8 @@ namespace icinga
 
 class ElasticsearchWriter : ConfigObject
 {
+	activation_priority 100;
+
 	[config, required] String host {
 		default {{{ return "127.0.0.1"; }}}
 	};
diff --git a/lib/perfdata/gelfwriter.ti b/lib/perfdata/gelfwriter.ti
index 522d527e98b..facc94a6da6 100644
--- a/lib/perfdata/gelfwriter.ti
+++ b/lib/perfdata/gelfwriter.ti
@@ -26,6 +26,8 @@ namespace icinga
 
 class GelfWriter : ConfigObject
 {
+	activation_priority 100;
+
 	[config] String host {
 		default {{{ return "127.0.0.1"; }}}
 	};
diff --git a/lib/perfdata/graphitewriter.ti b/lib/perfdata/graphitewriter.ti
index 9b1fc2529d2..ca04959f53a 100644
--- a/lib/perfdata/graphitewriter.ti
+++ b/lib/perfdata/graphitewriter.ti
@@ -26,6 +26,8 @@ namespace icinga
 
 class GraphiteWriter : ConfigObject
 {
+	activation_priority 100;
+
 	[config] String host {
 		default {{{ return "127.0.0.1"; }}}
 	};
diff --git a/lib/perfdata/influxdbwriter.ti b/lib/perfdata/influxdbwriter.ti
index f2906614f91..5ff11675485 100644
--- a/lib/perfdata/influxdbwriter.ti
+++ b/lib/perfdata/influxdbwriter.ti
@@ -26,6 +26,8 @@ namespace icinga
 
 class InfluxdbWriter : ConfigObject
 {
+	activation_priority 100;
+
 	[config, required] String host {
 		default {{{ return "127.0.0.1"; }}}
 	};
diff --git a/lib/perfdata/opentsdbwriter.ti b/lib/perfdata/opentsdbwriter.ti
index 7e2844ead70..ea9455b9e25 100644
--- a/lib/perfdata/opentsdbwriter.ti
+++ b/lib/perfdata/opentsdbwriter.ti
@@ -26,6 +26,8 @@ namespace icinga
 
 class OpenTsdbWriter : ConfigObject
 {
+	activation_priority 100;
+
 	[config] String host {
 		default {{{ return "127.0.0.1"; }}}
 	};
diff --git a/lib/perfdata/perfdatawriter.ti b/lib/perfdata/perfdatawriter.ti
index 769a04431c8..c0988f339f3 100644
--- a/lib/perfdata/perfdatawriter.ti
+++ b/lib/perfdata/perfdatawriter.ti
@@ -27,6 +27,8 @@ namespace icinga
 
 class PerfdataWriter : ConfigObject
 {
+	activation_priority 100;
+
 	[config] String host_perfdata_path {
 		default {{{ return Application::GetLocalStateDir() + "/spool/icinga2/perfdata/host-perfdata"; }}}
 	};
diff --git a/lib/remote/apilistener.ti b/lib/remote/apilistener.ti
index e072fcd20ce..e04fa01859e 100644
--- a/lib/remote/apilistener.ti
+++ b/lib/remote/apilistener.ti
@@ -28,6 +28,8 @@ namespace icinga
 
 class ApiListener : ConfigObject
 {
+	activation_priority 50;
+
 	[config, deprecated] String cert_path;
 	[config, deprecated] String key_path;
 	[config, deprecated] String ca_path;
diff --git a/tools/mkclass/class_lexer.ll b/tools/mkclass/class_lexer.ll
index 939a950b8d1..19c75b6267f 100644
--- a/tools/mkclass/class_lexer.ll
+++ b/tools/mkclass/class_lexer.ll
@@ -135,6 +135,7 @@ class				{ return T_CLASS; }
 namespace			{ return T_NAMESPACE; }
 code				{ return T_CODE; }
 load_after			{ return T_LOAD_AFTER; }
+activation_priority	{ return T_ACTIVATION_PRIORITY; }
 library				{ return T_LIBRARY; }
 abstract			{ yylval->num = TAAbstract; return T_CLASS_ATTRIBUTE; }
 vararg_constructor		{ yylval->num = TAVarArgConstructor; return T_CLASS_ATTRIBUTE; }
@@ -164,6 +165,7 @@ navigate			{ yylval->num = FTNavigate; return T_FIELD_ACCESSOR_TYPE; }
 \"[^\"]+\"			{ yylval->text = strdup(yytext + 1); yylval->text[strlen(yylval->text) - 1] = '\0'; return T_STRING; }
 \<[^ \>]*\>			{ yylval->text = strdup(yytext + 1); yylval->text[strlen(yylval->text) - 1] = '\0'; return T_ANGLE_STRING; }
 [a-zA-Z_][:a-zA-Z0-9\-_]*	{ yylval->text = strdup(yytext); return T_IDENTIFIER; }
+-?[0-9]+(\.[0-9]+)?		{ yylval->num = strtod(yytext, NULL); return T_NUMBER; }
 
 .				return yytext[0];
 
diff --git a/tools/mkclass/class_parser.yy b/tools/mkclass/class_parser.yy
index 2165549eb88..8f14ffc9de0 100644
--- a/tools/mkclass/class_parser.yy
+++ b/tools/mkclass/class_parser.yy
@@ -61,6 +61,7 @@ using namespace icinga;
 %token T_CLASS "class (T_CLASS)"
 %token T_CODE "code (T_CODE)"
 %token T_LOAD_AFTER "load_after (T_LOAD_AFTER)"
+%token T_ACTIVATION_PRIORITY "activation_priority (T_ACTIVATION_PRIORITY)"
 %token T_LIBRARY "library (T_LIBRARY)"
 %token T_NAMESPACE "namespace (T_NAMESPACE)"
 %token T_VALIDATOR "validator (T_VALIDATOR)"
@@ -77,6 +78,7 @@ using namespace icinga;
 %token T_SET "set (T_SET)"
 %token T_DEFAULT "default (T_DEFAULT)"
 %token T_FIELD_ACCESSOR_TYPE "field_accessor_type (T_FIELD_ACCESSOR_TYPE)"
+%token T_NUMBER "number (T_NUMBER)"
 %type <text> T_IDENTIFIER
 %type <text> T_STRING
 %type <text> T_ANGLE_STRING
@@ -106,6 +108,7 @@ using namespace icinga;
 %type <rule> validator_rule
 %type <rules> validator_rules
 %type <validator> validator
+%type <num> T_NUMBER
 
 %{
 
@@ -250,6 +253,8 @@ class: class_attribute_list T_CLASS T_IDENTIFIER inherits_specifier type_base_sp
 		for (const Field& field : *$7) {
 			if (field.Attributes & FALoadDependency) {
 				$$->LoadDependencies.push_back(field.Name);
+			} else if (field.Attributes & FAActivationPriority) {
+				$$->ActivationPriority = field.Priority;
 			} else
 				$$->Fields.push_back(field);
 		}
@@ -380,6 +385,13 @@ class_field: field_attribute_list field_type identifier alternative_name_specifi
 		std::free($2);
 		$$ = field;
 	}
+	| T_ACTIVATION_PRIORITY T_NUMBER ';'
+	{
+		auto *field = new Field();
+		field->Attributes = FAActivationPriority;
+		field->Priority = $2;
+		$$ = field;
+	}
 	;
 
 alternative_name_specifier: /* empty */
diff --git a/tools/mkclass/classcompiler.cpp b/tools/mkclass/classcompiler.cpp
index 1899e6d296e..374c54d1cb8 100644
--- a/tools/mkclass/classcompiler.cpp
+++ b/tools/mkclass/classcompiler.cpp
@@ -408,6 +408,14 @@ void ClassCompiler::HandleClass(const Klass& klass, const ClassDebugInfo&)
 	m_Impl << "\t" << "return deps;" << std::endl
 		<< "}" << std::endl << std::endl;
 
+	/* GetActivationPriority */
+	m_Header << "\t" << "int GetActivationPriority() const override;" << std::endl;
+
+	m_Impl << "int TypeImpl<" << klass.Name << ">::GetActivationPriority() const" << std::endl
+		<< "{" << std::endl
+		<< "\t" << "return " << klass.ActivationPriority << ";" << std::endl
+		<< "}" << std::endl << std::endl;
+
 	/* RegisterAttributeHandler */
 	m_Header << "public:" << std::endl
 			<< "\t" << "void RegisterAttributeHandler(int fieldId, const Type::AttributeHandler& callback) override;" << std::endl;
diff --git a/tools/mkclass/classcompiler.hpp b/tools/mkclass/classcompiler.hpp
index 3f0e7d4ea91..e2124645d9d 100644
--- a/tools/mkclass/classcompiler.hpp
+++ b/tools/mkclass/classcompiler.hpp
@@ -76,7 +76,8 @@ enum FieldAttribute
 	FANoUserView = 2048,
 	FADeprecated = 4096,
 	FAGetVirtual = 8192,
-	FASetVirtual = 16384
+	FASetVirtual = 16384,
+	FAActivationPriority = 32768
 };
 
 struct FieldType
@@ -122,6 +123,7 @@ struct Field
 	std::string NavigationName;
 	std::string NavigateAccessor;
 	bool PureNavigateAccessor{false};
+	int Priority{0};
 
 	inline std::string GetFriendlyName() const
 	{
@@ -167,6 +169,7 @@ struct Klass
 	int Attributes;
 	std::vector<Field> Fields;
 	std::vector<std::string> LoadDependencies;
+	int ActivationPriority{0};
 };
 
 enum RuleAttribute