diff --git a/async_substrate_interface/utils/cache.py b/async_substrate_interface/utils/cache.py
index 5cf1fe4..1c4a034 100644
--- a/async_substrate_interface/utils/cache.py
+++ b/async_substrate_interface/utils/cache.py
@@ -20,6 +20,7 @@
     if USE_CACHE
     else ":memory:"
 )
+SUBSTRATE_CACHE_METHOD_SIZE = int(os.getenv("SUBSTRATE_CACHE_METHOD_SIZE", "512"))
 
 logger = logging.getLogger("async_substrate_interface")
 
@@ -66,7 +67,7 @@ async def __call__(self, chain, other_self, func, args, kwargs) -> Optional[Any]
                           WHERE rowid IN (
                             SELECT rowid FROM {table_name}
                             ORDER BY created_at DESC
-                            LIMIT -1 OFFSET 500
+                            LIMIT -1 OFFSET {SUBSTRATE_CACHE_METHOD_SIZE}
                           );
                         END;
                 """
@@ -205,7 +206,7 @@ def inner(self, *args, **kwargs):
 
 def async_sql_lru_cache(maxsize: Optional[int] = None):
     def decorator(func):
-        @cached_fetcher(max_size=maxsize)
+        @cached_fetcher(max_size=maxsize, cache_key_index=None)
         async def inner(self, *args, **kwargs):
             async_sql_db = AsyncSqliteDB(self.url)
             result = await async_sql_db(self.url, self, func, args, kwargs)