diff --git a/Cargo.lock b/Cargo.lock
index ae09bcaefb8..f4b3d81014d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -7197,6 +7197,7 @@ dependencies = [
  "dashmap",
  "indexmap 2.12.1",
  "itertools 0.14.0",
+ "libc",
  "libsecp256k1",
  "log",
  "lz4",
diff --git a/accounts-db/Cargo.toml b/accounts-db/Cargo.toml
index 9d545184079..2125690a1c2 100644
--- a/accounts-db/Cargo.toml
+++ b/accounts-db/Cargo.toml
@@ -48,6 +48,7 @@ crossbeam-channel = { workspace = true }
 dashmap = { workspace = true, features = ["rayon", "raw-api"] }
 indexmap = { workspace = true }
 itertools = { workspace = true }
+libc = { workspace = true }
 log = { workspace = true }
 lz4 = { workspace = true }
 memmap2 = { workspace = true }
diff --git a/accounts-db/src/append_vec.rs b/accounts-db/src/append_vec.rs
index f105516535a..319e8f0a16e 100644
--- a/accounts-db/src/append_vec.rs
+++ b/accounts-db/src/append_vec.rs
@@ -41,6 +41,7 @@ use {
         fs::{remove_file, File, OpenOptions},
         io::{self, BufRead, Seek, SeekFrom, Write},
         mem::{self, MaybeUninit},
+        os::fd::{AsFd, AsRawFd},
         path::{Path, PathBuf},
         ptr, slice,
         sync::{
@@ -262,6 +263,12 @@ impl AppendVec {
             })
             .unwrap();
 
+        // tell the kernel that we expect to randomly access the file and not to bother using
+        // page cache and reading ahead
+        unsafe {
+            libc::posix_fadvise(data.as_fd().as_raw_fd(), 0, 0, libc::POSIX_FADV_RANDOM);
+        }
+
         // Theoretical performance optimization: write a zero to the end of
         // the file so that we won't have to resize it later, which may be
         // expensive.