From 8b10701a0f6f2826be4d4e4103a5cab1780e65c9 Mon Sep 17 00:00:00 2001
From: Christian Schwarz <christian@neon.tech>
Date: Tue, 23 Apr 2024 13:58:21 +0000
Subject: [PATCH] perf!: use 64k insteadn of 8k buffers for blob_io and
 ephemeral_file

---
 pageserver/src/tenant/blob_io.rs                               | 2 +-
 pageserver/src/tenant/ephemeral_file/zero_padded_read_write.rs | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/pageserver/src/tenant/blob_io.rs b/pageserver/src/tenant/blob_io.rs
index 0d33100ead..6e90b3e8ff 100644
--- a/pageserver/src/tenant/blob_io.rs
+++ b/pageserver/src/tenant/blob_io.rs
@@ -121,7 +121,7 @@ impl<const BUFFERED: bool> BlobWriter<BUFFERED> {
         self.offset
     }
 
-    const CAPACITY: usize = if BUFFERED { PAGE_SZ } else { 0 };
+    const CAPACITY: usize = if BUFFERED { 64 * 1024 } else { 0 };
 
     /// Writes the given buffer directly to the underlying `VirtualFile`.
     /// You need to make sure that the internal buffer is empty, otherwise
diff --git a/pageserver/src/tenant/ephemeral_file/zero_padded_read_write.rs b/pageserver/src/tenant/ephemeral_file/zero_padded_read_write.rs
index aa5a26e338..8b828142a4 100644
--- a/pageserver/src/tenant/ephemeral_file/zero_padded_read_write.rs
+++ b/pageserver/src/tenant/ephemeral_file/zero_padded_read_write.rs
@@ -41,7 +41,7 @@ pub enum ReadResult<'a> {
 }
 
 impl RW {
-    const TAIL_SZ: usize = PAGE_SZ;
+    const TAIL_SZ: usize = 64 * 1024;
 
     pub fn new(file: VirtualFile) -> Self {
         let bytes_flushed_tracker = owned_buffers_io::util::size_tracking_writer::Writer::new(file);