diff --git a/pageserver/src/tenant_tasks.rs b/pageserver/src/tenant_tasks.rs
index 6871ac3001..b0bb4953ca 100644
--- a/pageserver/src/tenant_tasks.rs
+++ b/pageserver/src/tenant_tasks.rs
@@ -119,8 +119,6 @@ pub fn start_compaction_loop(tenantid: ZTenantId) -> anyhow::Result<()> {
 pub fn init_tenant_task_pool() -> anyhow::Result<()> {
     let runtime = tokio::runtime::Builder::new_multi_thread()
         .thread_name("tenant-task-worker")
-        .worker_threads(40) // Way more than necessary
-        .max_blocking_threads(100) // Way more than necessary
         .enable_all()
         .build()?;
 
diff --git a/pageserver/src/walreceiver.rs b/pageserver/src/walreceiver.rs
index 2b5a3123c1..9f0f911e0c 100644
--- a/pageserver/src/walreceiver.rs
+++ b/pageserver/src/walreceiver.rs
@@ -91,7 +91,6 @@ pub fn init_wal_receiver_main_thread(
 
     let runtime = tokio::runtime::Builder::new_multi_thread()
         .thread_name("wal-receiver-runtime-thread")
-        .worker_threads(40)
         .enable_all()
         .on_thread_start(|| IS_WAL_RECEIVER.with(|c| c.set(true)))
         .build()