diff --git a/schema.sql b/schema.sql
index 7ceca61..2bce193 100644
--- a/schema.sql
+++ b/schema.sql
@@ -11,6 +11,7 @@ CREATE TABLE host_uptime (
     -- uptime in seconds
     uptime INT NOT NULL
 );
+CREATE INDEX host_uptime_host_id_created_at_idx ON host_uptime(host_id, created_at);
 
 CREATE TABLE host_mem (
     id SERIAL PRIMARY KEY,
@@ -19,6 +20,7 @@ CREATE TABLE host_mem (
     -- available memory in kB
     mem_avail INT NOT NULL
 );
+CREATE INDEX host_mem_host_id_created_at_idx ON host_mem(host_id, created_at);
 
 CREATE TABLE host_disk (
     id SERIAL PRIMARY KEY,
@@ -27,6 +29,7 @@ CREATE TABLE host_disk (
     -- free disk space in kB
     disk_free INT NOT NULL
 );
+CREATE INDEX host_disk_host_id_created_at_idx ON host_disk(host_id, created_at);
 
 CREATE TABLE host_cpu (
     id SERIAL PRIMARY KEY,
@@ -35,3 +38,4 @@ CREATE TABLE host_cpu (
     -- cpu load for last minute
     cpu_load_1m FLOAT NOT NULL
 );
+CREATE INDEX host_cpu_host_id_created_at_idx ON host_cpu(host_id, created_at);