MReduce default checkpoint distance to 64Mb

pageserver/src/layered_repository.rs

@@ -596,8 +596,8 @@ impl Timeline for LayeredTimeline {
             .wait_for_timeout(lsn, TIMEOUT)
             .with_context(|| {
                 format!(
-                    "Timed out while waiting for WAL record at LSN {} to arrive",
-                    lsn
+                    "Timed out while waiting for WAL record at LSN {} to arrive, disk consistent LSN={}",
+                    lsn, self.get_disk_consistent_lsn()
                 )
             })?;
 

pageserver/src/lib.rs

@@ -32,7 +32,7 @@ pub mod defaults {
     // FIXME: This current value is very low. I would imagine something like 1 GB or 10 GB
     // would be more appropriate. But a low value forces the code to be exercised more,
     // which is good for now to trigger bugs.
-    pub const DEFAULT_CHECKPOINT_DISTANCE: u64 = 256 * 1024 * 1024;
+    pub const DEFAULT_CHECKPOINT_DISTANCE: u64 = 64 * 1024 * 1024;
     pub const DEFAULT_CHECKPOINT_PERIOD: Duration = Duration::from_secs(1);
 
     pub const DEFAULT_GC_HORIZON: u64 = 64 * 1024 * 1024;