diff --git a/ereuse_devicehub/resources/agent/models.py b/ereuse_devicehub/resources/agent/models.py
index 6b647dc2..02082843 100644
--- a/ereuse_devicehub/resources/agent/models.py
+++ b/ereuse_devicehub/resources/agent/models.py
@@ -27,7 +27,7 @@ class JoinedTableMixin:
 
 class Agent(Thing):
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid4)
-    type = Column(Unicode, nullable=False)
+    type = Column(Unicode, nullable=False, index=True)
     name = Column(CIText())
     name.comment = """
         The name of the organization or person.
diff --git a/ereuse_devicehub/resources/device/models.py b/ereuse_devicehub/resources/device/models.py
index 5f72f86a..031a2a53 100644
--- a/ereuse_devicehub/resources/device/models.py
+++ b/ereuse_devicehub/resources/device/models.py
@@ -36,7 +36,7 @@ class Device(Thing):
     id.comment = """
         The identifier of the device for this database.
     """
-    type = Column(Unicode(STR_SM_SIZE), nullable=False)
+    type = Column(Unicode(STR_SM_SIZE), nullable=False, index=True)
     hid = Column(Unicode(), check_lower('hid'), unique=True)
     hid.comment = """
         The Hardware ID (HID) is the unique ID traceability systems 
@@ -375,7 +375,7 @@ class Cellphone(Mobile):
 class Component(Device):
     id = Column(BigInteger, ForeignKey(Device.id), primary_key=True)
 
-    parent_id = Column(BigInteger, ForeignKey(Computer.id))
+    parent_id = Column(BigInteger, ForeignKey(Computer.id), index=True)
     parent = relationship(Computer,
                           backref=backref('components',
                                           lazy=True,
diff --git a/ereuse_devicehub/resources/event/models.py b/ereuse_devicehub/resources/event/models.py
index 656cf76a..f509fdd2 100644
--- a/ereuse_devicehub/resources/event/models.py
+++ b/ereuse_devicehub/resources/event/models.py
@@ -43,7 +43,7 @@ class JoinedTableMixin:
 
 class Event(Thing):
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid4)
-    type = Column(Unicode, nullable=False)
+    type = Column(Unicode, nullable=False, index=True)
     name = Column(CIText(), default='', nullable=False)
     name.comment = """
         A name or title for the event. Used when searching for events.
@@ -148,7 +148,7 @@ class Event(Thing):
     For Add and Remove though, this has another meaning: the components
     that are added or removed.
     """
-    parent_id = Column(BigInteger, ForeignKey(Computer.id))
+    parent_id = Column(BigInteger, ForeignKey(Computer.id), index=True)
     parent = relationship(Computer,
                           backref=backref('events_parent',
                                           lazy=True,
@@ -222,7 +222,7 @@ class JoinedWithOneDeviceMixin:
 
 
 class EventWithOneDevice(JoinedTableMixin, Event):
-    device_id = Column(BigInteger, ForeignKey(Device.id), nullable=False)
+    device_id = Column(BigInteger, ForeignKey(Device.id), nullable=False, index=True)
     device = relationship(Device,
                           backref=backref('events_one',
                                           lazy=True,
diff --git a/ereuse_devicehub/resources/lot/models.py b/ereuse_devicehub/resources/lot/models.py
index 38e11df1..16220026 100644
--- a/ereuse_devicehub/resources/lot/models.py
+++ b/ereuse_devicehub/resources/lot/models.py
@@ -131,7 +131,7 @@ class Path(db.Model):
     id = db.Column(db.UUID(as_uuid=True),
                    primary_key=True,
                    server_default=db.text('gen_random_uuid()'))
-    lot_id = db.Column(db.UUID(as_uuid=True), db.ForeignKey(Lot.id), nullable=False)
+    lot_id = db.Column(db.UUID(as_uuid=True), db.ForeignKey(Lot.id), nullable=False, index=True)
     lot = db.relationship(Lot,
                           backref=db.backref('paths', lazy=True, collection_class=set),
                           primaryjoin=Lot.id == lot_id)
diff --git a/ereuse_devicehub/resources/models.py b/ereuse_devicehub/resources/models.py
index c8e9b7ec..d0dbd2a1 100644
--- a/ereuse_devicehub/resources/models.py
+++ b/ereuse_devicehub/resources/models.py
@@ -13,12 +13,14 @@ class Thing(db.Model):
     # todo make updated to auto-update
     updated = db.Column(db.TIMESTAMP(timezone=True),
                         nullable=False,
+                        index=True,
                         server_default=db.text('CURRENT_TIMESTAMP'))
     updated.comment = """
         When this was last changed.
     """
     created = db.Column(db.TIMESTAMP(timezone=True),
                         nullable=False,
+                        index=True,
                         server_default=db.text('CURRENT_TIMESTAMP'))
     created.comment = """
         When Devicehub created this.
diff --git a/ereuse_devicehub/resources/tag/model.py b/ereuse_devicehub/resources/tag/model.py
index 1ef2a530..1c6fc0f0 100644
--- a/ereuse_devicehub/resources/tag/model.py
+++ b/ereuse_devicehub/resources/tag/model.py
@@ -32,12 +32,13 @@ class Tag(Thing):
     """
     device_id = Column(BigInteger,
                        # We don't want to delete the tag on device deletion, only set to null
-                       ForeignKey(Device.id, ondelete=DB_CASCADE_SET_NULL))
+                       ForeignKey(Device.id, ondelete=DB_CASCADE_SET_NULL),
+                       index=True)
     device = relationship(Device,
                           backref=backref('tags', lazy=True, collection_class=set),
                           primaryjoin=Device.id == device_id)
     """The device linked to this tag."""
-    secondary = Column(Unicode(), check_lower('secondary'))
+    secondary = Column(Unicode(), check_lower('secondary'), index=True)
     secondary.comment = """
         A secondary identifier for this tag. It has the same
         constraints as the main one. Only needed in special cases.