diff --git a/packages/backend-rs/src/config/server.rs b/packages/backend-rs/src/config/server.rs
index 6bc5a0a0eb..52ff2e7707 100644
--- a/packages/backend-rs/src/config/server.rs
+++ b/packages/backend-rs/src/config/server.rs
@@ -22,7 +22,7 @@ struct ServerConfig {
     pub proxy_bypass_hosts: Option<Vec<String>>,
 
     pub allowed_private_networks: Option<Vec<String>>,
-    /// `NapiValue` is not implemented for `u64`
+    // TODO: i64 -> u64 (NapiValue is not implemented for u64)
     pub max_file_size: Option<i64>,
     pub access_log: Option<String>,
     pub cluster_limits: Option<WorkerConfigInternal>,
@@ -298,7 +298,7 @@ fn read_manifest() -> Manifest {
 }
 
 #[crate::export]
-fn load_config() -> Config {
+pub fn load_config() -> Config {
     let server_config = read_config_file();
     let version = read_meta().version;
     let manifest = read_manifest();
diff --git a/packages/backend-rs/src/database/postgresql.rs b/packages/backend-rs/src/database/postgresql.rs
index 212183cbf2..3ca3dc1c61 100644
--- a/packages/backend-rs/src/database/postgresql.rs
+++ b/packages/backend-rs/src/database/postgresql.rs
@@ -1,8 +1,9 @@
 use crate::config::CONFIG;
+use once_cell::sync::OnceCell;
 use sea_orm::{ConnectOptions, Database, DbConn, DbErr};
 use tracing::log::LevelFilter;
 
-static DB_CONN: once_cell::sync::OnceCell<DbConn> = once_cell::sync::OnceCell::new();
+static DB_CONN: OnceCell<DbConn> = OnceCell::new();
 
 async fn init_database() -> Result<&'static DbConn, DbErr> {
     let database_uri = format!(
diff --git a/packages/backend-rs/src/database/redis.rs b/packages/backend-rs/src/database/redis.rs
index fe5d3bb5d5..b049a75545 100644
--- a/packages/backend-rs/src/database/redis.rs
+++ b/packages/backend-rs/src/database/redis.rs
@@ -1,7 +1,8 @@
 use crate::config::CONFIG;
+use once_cell::sync::OnceCell;
 use redis::{Client, Connection, RedisError};
 
-static REDIS_CLIENT: once_cell::sync::OnceCell<Client> = once_cell::sync::OnceCell::new();
+static REDIS_CLIENT: OnceCell<Client> = OnceCell::new();
 
 fn init_redis() -> Result<Client, RedisError> {
     let redis_url = {
@@ -26,7 +27,7 @@ fn init_redis() -> Result<Client, RedisError> {
         params.concat()
     };
 
-    tracing::info!("Initializing Redis connection");
+    tracing::info!("Initializing Redis client");
 
     Client::open(redis_url)
 }
@@ -38,8 +39,8 @@ pub fn redis_conn() -> Result<Connection, RedisError> {
     }
 }
 
-#[inline]
 /// prefix redis key
+#[inline]
 pub fn key(key: impl ToString) -> String {
     format!("{}:{}", CONFIG.redis_key_prefix, key.to_string())
 }
diff --git a/packages/backend-rs/src/init/server_stats.rs b/packages/backend-rs/src/init/hardware_stats.rs
similarity index 93%
rename from packages/backend-rs/src/init/server_stats.rs
rename to packages/backend-rs/src/init/hardware_stats.rs
index 9b99dba013..b57cb6e47b 100644
--- a/packages/backend-rs/src/init/server_stats.rs
+++ b/packages/backend-rs/src/init/hardware_stats.rs
@@ -3,7 +3,7 @@ use sysinfo::System;
 
 pub type SystemMutexError = PoisonError<MutexGuard<'static, System>>;
 
-// TODO: handle this in more proper way when we move the entry point to backend-rs
+// TODO: handle this in a more proper way when we move the entry point to backend-rs
 pub fn system() -> Result<MutexGuard<'static, System>, SystemMutexError> {
     pub static SYSTEM: OnceLock<Mutex<System>> = OnceLock::new();
     SYSTEM.get_or_init(|| Mutex::new(System::new_all())).lock()
diff --git a/packages/backend-rs/src/init/mod.rs b/packages/backend-rs/src/init/mod.rs
index 0f6e5efebc..6a72c210d1 100644
--- a/packages/backend-rs/src/init/mod.rs
+++ b/packages/backend-rs/src/init/mod.rs
@@ -1,2 +1,2 @@
+pub mod hardware_stats;
 pub mod log;
-pub mod server_stats;
diff --git a/packages/backend-rs/src/misc/check_word_mute.rs b/packages/backend-rs/src/misc/check_word_mute.rs
index cee262c35a..bfb8c72c58 100644
--- a/packages/backend-rs/src/misc/check_word_mute.rs
+++ b/packages/backend-rs/src/misc/check_word_mute.rs
@@ -4,7 +4,7 @@ use once_cell::sync::Lazy;
 use regex::Regex;
 use sea_orm::{prelude::*, QuerySelect};
 
-/// TODO: handle name collisions better
+// TODO: handle name collisions in a better way
 #[crate::export(object, js_name = "NoteLikeForCheckWordMute")]
 pub struct NoteLike {
     pub file_ids: Vec<String>,
diff --git a/packages/backend-rs/src/misc/get_note_summary.rs b/packages/backend-rs/src/misc/get_note_summary.rs
index 3b759b04f5..8ed092334e 100644
--- a/packages/backend-rs/src/misc/get_note_summary.rs
+++ b/packages/backend-rs/src/misc/get_note_summary.rs
@@ -1,4 +1,4 @@
-/// TODO: handle name collisions better
+// TODO: handle name collisions in a better way
 #[crate::export(object, js_name = "NoteLikeForGetNoteSummary")]
 pub struct NoteLike {
     pub file_ids: Vec<String>,
diff --git a/packages/backend-rs/src/misc/server_stats.rs b/packages/backend-rs/src/misc/hardware_stats.rs
similarity index 97%
rename from packages/backend-rs/src/misc/server_stats.rs
rename to packages/backend-rs/src/misc/hardware_stats.rs
index ab9dc52be8..f21e4c59a5 100644
--- a/packages/backend-rs/src/misc/server_stats.rs
+++ b/packages/backend-rs/src/misc/hardware_stats.rs
@@ -1,4 +1,4 @@
-use crate::init::server_stats::{system, SystemMutexError};
+use crate::init::hardware_stats::{system, SystemMutexError};
 use sysinfo::{Disks, MemoryRefreshKind};
 
 // TODO: i64 -> u64 (we can't export u64 to Node.js)
diff --git a/packages/backend-rs/src/misc/mod.rs b/packages/backend-rs/src/misc/mod.rs
index da65e26bc2..ba1ad32c10 100644
--- a/packages/backend-rs/src/misc/mod.rs
+++ b/packages/backend-rs/src/misc/mod.rs
@@ -7,6 +7,7 @@ pub mod escape_sql;
 pub mod format_milliseconds;
 pub mod get_image_size;
 pub mod get_note_summary;
+pub mod hardware_stats;
 pub mod is_safe_url;
 pub mod latest_version;
 pub mod mastodon_id;
@@ -15,4 +16,3 @@ pub mod nyaify;
 pub mod password;
 pub mod reaction;
 pub mod remove_old_attestation_challenges;
-pub mod server_stats;