From bbe151e59429eff0ed549a98fcc356c9c9da8b7d Mon Sep 17 00:00:00 2001
From: "Jeff Washington (jwash)"
 <75863576+jeffwashington@users.noreply.github.com>
Date: Tue, 21 Sep 2021 08:42:13 -0500
Subject: [PATCH] AcctIdx: only flush if disk index being used (#20045)

---
 runtime/src/accounts_index_storage.rs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/runtime/src/accounts_index_storage.rs b/runtime/src/accounts_index_storage.rs
index 3d3878f49..eb53c01be 100644
--- a/runtime/src/accounts_index_storage.rs
+++ b/runtime/src/accounts_index_storage.rs
@@ -97,6 +97,7 @@ impl<T: IndexValue> AccountsIndexStorage<T> {
         in_mem: Vec<Arc<InMemAccountsIndex<T>>>,
     ) {
         let bins = in_mem.len();
+        let flush = storage.disk.is_some();
         loop {
             // this will transition to waits and thread throttling
             storage
@@ -108,8 +109,10 @@ impl<T: IndexValue> AccountsIndexStorage<T> {
 
             storage.stats.active_threads.fetch_add(1, Ordering::Relaxed);
             for _ in 0..bins {
-                let index = storage.next_bucket_to_flush();
-                in_mem[index].flush();
+                if flush {
+                    let index = storage.next_bucket_to_flush();
+                    in_mem[index].flush();
+                }
                 storage.stats.report_stats(&storage);
             }
             storage.stats.active_threads.fetch_sub(1, Ordering::Relaxed);