record: increase record.SyncConcurrency

Increase record.SyncConcurrency to 4096 to allow additional concurrency within the commit pipeline. In workloads with heavy writes and high concurrency, we've observed semaphore queueing artifically increasing tail latencies.
cockroachdb · Jul 24, 2023 · 4afa98e · 4afa98e
1 parent 05db878
commit 4afa98e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/record/log_writer.go b/record/log_writer.go
@@ -39,7 +39,7 @@ type syncer interface {
 }
 
 const (
-	syncConcurrencyBits = 9
+	syncConcurrencyBits = 12
 
 	// SyncConcurrency is the maximum number of concurrent sync operations that
 	// can be performed. Note that a sync operation is initiated either by a call