diff --git a/conduwuit-example.toml b/conduwuit-example.toml
index 2f3da71f..ad110360 100644
--- a/conduwuit-example.toml
+++ b/conduwuit-example.toml
@@ -158,6 +158,10 @@
 #
 #eventidshort_cache_capacity = varies by system
 
+# This item is undocumented. Please contribute documentation for it.
+#
+#eventid_pdu_cache_capacity = varies by system
+
 # This item is undocumented. Please contribute documentation for it.
 #
 #shortstatekey_cache_capacity = varies by system
@@ -166,6 +170,14 @@
 #
 #statekeyshort_cache_capacity = varies by system
 
+# This item is undocumented. Please contribute documentation for it.
+#
+#servernameevent_data_cache_capacity =
+
+# This item is undocumented. Please contribute documentation for it.
+#
+#readreceipt_cache_capacity =
+
 # This item is undocumented. Please contribute documentation for it.
 #
 #server_visibility_cache_capacity = varies by system
diff --git a/src/core/config/mod.rs b/src/core/config/mod.rs
index 66c78440..659149c4 100644
--- a/src/core/config/mod.rs
+++ b/src/core/config/mod.rs
@@ -210,6 +210,12 @@ pub struct Config {
 	#[serde(default = "default_statekeyshort_cache_capacity")]
 	pub statekeyshort_cache_capacity: u32,
 
+	#[serde(default = "default_servernameevent_data_cache_capacity")]
+	pub servernameevent_data_cache_capacity: u32,
+
+	#[serde(default = "default_readreceipt_cache_capacity")]
+	pub readreceipt_cache_capacity: u32,
+
 	/// default: varies by system
 	#[serde(default = "default_server_visibility_cache_capacity")]
 	pub server_visibility_cache_capacity: u32,
@@ -2051,6 +2057,10 @@ fn default_shortstatekey_cache_capacity() -> u32 { parallelism_scaled_u32(10_000
 
 fn default_statekeyshort_cache_capacity() -> u32 { parallelism_scaled_u32(10_000).saturating_add(100_000) }
 
+fn default_servernameevent_data_cache_capacity() -> u32 { parallelism_scaled_u32(100_000).saturating_add(500_000) }
+
+fn default_readreceipt_cache_capacity() -> u32 { parallelism_scaled_u32(25_000).saturating_add(100_000) }
+
 fn default_server_visibility_cache_capacity() -> u32 { parallelism_scaled_u32(500) }
 
 fn default_user_visibility_cache_capacity() -> u32 { parallelism_scaled_u32(1000) }
diff --git a/src/database/opts.rs b/src/database/opts.rs
index 732f571f..cd827b00 100644
--- a/src/database/opts.rs
+++ b/src/database/opts.rs
@@ -170,6 +170,24 @@ pub(crate) fn cf_options(
 			cache_size(cfg, cfg.statekeyshort_cache_capacity, 1024)?,
 		),
 
+		"servernameevent_data" => set_table_with_new_cache(
+			&mut opts,
+			cfg,
+			cache,
+			name,
+			cache_size(cfg, cfg.servernameevent_data_cache_capacity, 128)?
+			// Raw average value size = 102, key size = 34
+		),
+
+		"readreceiptid_readreceipt" => set_table_with_new_cache(
+			&mut opts,
+			cfg,
+			cache,
+			name,
+			cache_size(cfg, cfg.readreceipt_cache_capacity, 192)?
+			// Raw average value size = 90, key size = 70
+		),
+
 		"eventid_outlierpdu" => {
 			set_table_with_new_cache(&mut opts, cfg, cache, name, cache_size(cfg, cfg.pdu_cache_capacity, 1536)?);
 		},