diff --git a/charts/kubezero-logging/values.yaml b/charts/kubezero-logging/values.yaml
index 46515e3c..21f83ebf 100644
--- a/charts/kubezero-logging/values.yaml
+++ b/charts/kubezero-logging/values.yaml
@@ -185,15 +185,15 @@ fluentd:
           reload_on_failure true
           request_timeout 60s
           suppress_type_name true
-          slow_flush_log_threshold 40.0
+          slow_flush_log_threshold 50.0
           # bulk_message_request_threshold 2097152
 
           <buffer tag>
             @type file_single
-            chunk_limit_size 16MB
-            total_limit_size 4GB
+            chunk_limit_size 2MB
+            total_limit_size 2GB
             flush_mode interval
-            flush_thread_count 2
+            flush_thread_count 1
             flush_interval 10s
             flush_at_shutdown true
             retry_type exponential_backoff