diff --git a/runtime/src/accounts_db.rs b/runtime/src/accounts_db.rs
index a0b8b004ae..d84f051eca 100644
--- a/runtime/src/accounts_db.rs
+++ b/runtime/src/accounts_db.rs
@@ -2776,10 +2776,10 @@ impl AccountsDb {
     pub fn shrink_all_slots(&self, is_startup: bool, last_full_snapshot_slot: Option<Slot>) {
         const DIRTY_STORES_CLEANING_THRESHOLD: usize = 10_000;
         const OUTER_CHUNK_SIZE: usize = 2000;
-        const INNER_CHUNK_SIZE: usize = OUTER_CHUNK_SIZE / 8;
         if is_startup && self.caching_enabled {
             let slots = self.all_slots_in_storage();
-            let inner_chunk_size = std::cmp::max(INNER_CHUNK_SIZE, 1);
+            let threads = num_cpus::get();
+            let inner_chunk_size = std::cmp::max(OUTER_CHUNK_SIZE / threads, 1);
             slots.chunks(OUTER_CHUNK_SIZE).for_each(|chunk| {
                 chunk.par_chunks(inner_chunk_size).for_each(|slots| {
                     for slot in slots {