diff --git a/matrix/dbs_event_idx.cc b/matrix/dbs_event_idx.cc
index bcb6f794f..06477e7bb 100644
--- a/matrix/dbs_event_idx.cc
+++ b/matrix/dbs_event_idx.cc
@@ -30,7 +30,7 @@ ircd::m::dbs::desc::event_idx__cache__size
 {
 	{
 		{ "name",     "ircd.m.dbs._event_idx.cache.size" },
-		{ "default",  long(64_MiB)                       },
+		{ "default",  long(128_MiB)                      },
 	}, []
 	{
 		const size_t &value{event_idx__cache__size};
diff --git a/matrix/dbs_event_json.cc b/matrix/dbs_event_json.cc
index dd885c244..b9a393169 100644
--- a/matrix/dbs_event_json.cc
+++ b/matrix/dbs_event_json.cc
@@ -30,7 +30,7 @@ ircd::m::dbs::desc::event_json__cache__size
 {
 	{
 		{ "name",     "ircd.m.dbs._event_json.cache.size" },
-		{ "default",  long(64_MiB)                        },
+		{ "default",  long(128_MiB)                       },
 	}, []
 	{
 		const size_t &value{event_json__cache__size};
diff --git a/matrix/dbs_event_refs.cc b/matrix/dbs_event_refs.cc
index 89636b81d..663b9569e 100644
--- a/matrix/dbs_event_refs.cc
+++ b/matrix/dbs_event_refs.cc
@@ -42,7 +42,7 @@ ircd::m::dbs::desc::event_refs__cache__size
 {
 	{
 		{ "name",     "ircd.m.dbs._event_refs.cache.size" },
-		{ "default",  long(16_MiB)                        },
+		{ "default",  long(24_MiB)                        },
 	}, []
 	{
 		const size_t &value{event_refs__cache__size};
diff --git a/matrix/dbs_room_state_space.cc b/matrix/dbs_room_state_space.cc
index 5990611d0..d2e2928f8 100644
--- a/matrix/dbs_room_state_space.cc
+++ b/matrix/dbs_room_state_space.cc
@@ -35,7 +35,7 @@ ircd::m::dbs::desc::room_state_space__cache__size
 {
 	{
 		{ "name",     "ircd.m.dbs._room_state_space.cache.size"  },
-		{ "default",  long(16_MiB)                               },
+		{ "default",  long(32_MiB)                               },
 	}, []
 	{
 		const size_t &value{room_state_space__cache__size};