fix System.get_env("BLOCK_COUNT_CACHE_TTL") type

apps/explorer/config/config.exs

@@ -82,7 +82,8 @@ config :spandex_ecto, SpandexEcto.EctoLogger,
   tracer: Explorer.Tracer,
   otp_app: :explorer
 
-config :explorer, Explorer.Chain.BlockCountCache, ttl: System.get_env("BLOCK_COUNT_CACHE_TTL")
+config :explorer, Explorer.Chain.BlockCountCache,
+  ttl: System.get_env("BLOCK_COUNT_CACHE_TTL") && String.to_integer(System.get_env("BLOCK_COUNT_CACHE_TTL"))
 
 # Import environment specific config. This must remain at the bottom
 # of this file so it overrides the configuration defined above.

apps/explorer/lib/explorer/chain/block_count_cache.ex

@@ -6,8 +6,8 @@ defmodule Explorer.Chain.BlockCountCache do
   alias Explorer.Chain
 
   @tab :block_count_cache
-  # 1 minutes
-  @cache_period 1_000 * 60
+  # 10 minutes
+  @cache_period 1_000 * 60 * 10
   @key "count"
   @opts_key "opts"