diff --git a/roles/custom/matrix-synapse/templates/synapse/homeserver.yaml.j2 b/roles/custom/matrix-synapse/templates/synapse/homeserver.yaml.j2
index b6cc6428b..0fb8adc63 100644
--- a/roles/custom/matrix-synapse/templates/synapse/homeserver.yaml.j2
+++ b/roles/custom/matrix-synapse/templates/synapse/homeserver.yaml.j2
@@ -796,13 +796,13 @@ caches:
   # Controls whether cache entries are evicted after a specified time
   # period. Defaults to true. Uncomment to disable this feature.
   #
-  #expire_caches: false
+  expire_caches: {{ matrix_synapse_caches_expire_caches }}
 
   # If expire_caches is enabled, this flag controls how long an entry can
   # be in a cache without having been accessed before being evicted.
   # Defaults to 30m. Uncomment to set a different time to live for cache entries.
   #
-  #cache_entry_ttl: 30m
+  cache_entry_ttl: {{ matrix_synapse_caches_cache_entry_ttl }}
 
   # Controls how long the results of a /sync request are cached for after
   # a successful response is returned. A higher duration can help clients with
@@ -811,7 +811,16 @@ caches:
   # By default, this is zero, which means that sync responses are not cached
   # at all.
   #
-  #sync_response_cache_duration: 2m
+  sync_response_cache_duration: {{ matrix_synapse_caches_sync_response_cache_duration }}
+  
+  #FIX ME add documentation notes about these settings or remove this note. 
+  # Check upstream https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#caching
+  # for information for now
+  #
+  cache_autotuning:
+    max_cache_memory_usage: {{ matrix_synapse_caches_autotuning_max_cache_memory_usage }}
+    target_cache_memory_usage: {{ matrix_synapse_caches_autotuning_target_cache_memory_usage }}
+    min_cache_ttl: {{ matrix_synapse_caches_autotuning_min_cache_ttl }}
 
 
 ## Database ##