diff --git a/orm/author.py b/orm/author.py
index 49bf6d18..84fa3f67 100644
--- a/orm/author.py
+++ b/orm/author.py
@@ -31,7 +31,7 @@ class Author(Base):
     user = Column(String, unique=True)  # unbounded link with authorizer's User type
 
     name = Column(String, nullable=True, comment='Display name')
-    slug = Column(String, unique=True, comment="Author's slug")
+    slug = Column(String, unique=True, comment="Author's slug", index=True)
     bio = Column(String, nullable=True, comment='Bio')  # status description
     about = Column(String, nullable=True, comment='About')  # long and formatted
     pic = Column(String, nullable=True, comment='Picture')
diff --git a/orm/collection.py b/orm/collection.py
index 87592bc8..c0b8d342 100644
--- a/orm/collection.py
+++ b/orm/collection.py
@@ -16,7 +16,7 @@ class ShoutCollection(Base):
 class Collection(Base):
     __tablename__ = 'collection'
 
-    slug = Column(String, unique=True)
+    slug = Column(String, unique=True, index=True)
     title = Column(String, nullable=False, comment='Title')
     body = Column(String, nullable=True, comment='Body')
     pic = Column(String, nullable=True, comment='Picture')
diff --git a/orm/community.py b/orm/community.py
index ff156bd9..3c186a0c 100644
--- a/orm/community.py
+++ b/orm/community.py
@@ -21,7 +21,7 @@ class Community(Base):
     __tablename__ = 'community'
 
     name = Column(String, nullable=False)
-    slug = Column(String, nullable=False, unique=True)
+    slug = Column(String, nullable=False, unique=True, index=True)
     desc = Column(String, nullable=False, default='')
     pic = Column(String, nullable=False, default='')
     created_at = Column(Integer, nullable=False, default=lambda: int(time.time()))
diff --git a/orm/shout.py b/orm/shout.py
index 2757bcb6..e5f53d9f 100644
--- a/orm/shout.py
+++ b/orm/shout.py
@@ -61,7 +61,7 @@ class Shout(Base):
     deleted_by = Column(ForeignKey('author.id'), nullable=True)
 
     body = Column(String, nullable=False, comment='Body')
-    slug = Column(String, unique=True)
+    slug = Column(String, unique=True, index=True)
     cover = Column(String, nullable=True, comment='Cover image url')
     cover_caption = Column(String, nullable=True, comment='Cover image alt caption')
     lead = Column(String, nullable=True)
diff --git a/orm/topic.py b/orm/topic.py
index 928b0129..73e0131b 100644
--- a/orm/topic.py
+++ b/orm/topic.py
@@ -18,7 +18,7 @@ class TopicFollower(Base):
 class Topic(Base):
     __tablename__ = 'topic'
 
-    slug = Column(String, unique=True)
+    slug = Column(String, unique=True, index=True)
     title = Column(String, nullable=False, comment='Title')
     body = Column(String, nullable=True, comment='Body')
     pic = Column(String, nullable=True, comment='Picture')
diff --git a/services/db.py b/services/db.py
index 4a6f54c6..06a84fc5 100644
--- a/services/db.py
+++ b/services/db.py
@@ -33,12 +33,12 @@ Base = declarative_base()
 @event.listens_for(Engine, 'before_cursor_execute')
 def before_cursor_execute(conn, cursor, statement, parameters, context, executemany):
     conn.info.setdefault('query_start_time', []).append(time.time())
-    logger.debug(f" {statement}")
+    logger.debug(f"\n{statement}")
 
 @event.listens_for(Engine, 'after_cursor_execute')
 def after_cursor_execute(conn, cursor, statement, parameters, context, executemany):
     total = time.time() - conn.info['query_start_time'].pop(-1)
-    logger.debug(f' ... {total*1000} s ')
+    logger.debug(f' ... {total*1000} s\n')
 
 def local_session(src=''):
     return Session(bind=engine, expire_on_commit=False)