never allow only 1 tokio worker or rocksdb parallelism thread (max compare)

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/database/rocksdb/opts.rs

@@ -22,7 +22,7 @@ pub(crate) fn db_options(config: &Config, env: &mut Env, row_cache: &Cache, col_
 
 	// Processing
 	let threads = if config.rocksdb_parallelism_threads == 0 {
-		num_cpus::get() // max cores if user specified 0
+		std::cmp::max(2, num_cpus::get()) // max cores if user specified 0
 	} else {
 		config.rocksdb_parallelism_threads
 	};

src/main.rs

@@ -515,7 +515,7 @@ fn init(args: clap::Args) -> Result<Server, Error> {
 			.enable_io()
 			.enable_time()
 			.thread_name("conduwuit:worker")
-			.worker_threads(num_cpus::get())
+			.worker_threads(std::cmp::max(2, num_cpus::get()))
 			.build()
 			.unwrap(),