feat: config option for rocksdb max open files

src/database.rs

@@ -49,6 +49,8 @@ pub struct Config {
     database_path: String,
     #[serde(default = "default_db_cache_capacity_mb")]
     db_cache_capacity_mb: f64,
+    #[serde(default = "default_rocksdb_max_open_files")]
+    rocksdb_max_open_files: i32,
     #[serde(default = "default_pdu_cache_capacity")]
     pdu_cache_capacity: u32,
     #[serde(default = "default_cleanup_second_interval")]
@@ -127,6 +129,10 @@ fn default_db_cache_capacity_mb() -> f64 {
     10.0
 }
 
+fn default_rocksdb_max_open_files() -> i32 {
+    512
+}
+
 fn default_pdu_cache_capacity() -> u32 {
     1_000_000
 }