change the log level from info to trace for aggregator twolevel

Author: BohuTANG

src/query/service/src/pipelines/processors/transforms/aggregator/aggregator_twolevel.rs

@@ -27,7 +27,7 @@ use common_hashtable::FastHash;
 use common_hashtable::HashtableEntryMutRefLike;
 use common_hashtable::HashtableEntryRefLike;
 use common_hashtable::HashtableLike;
-use tracing::info;
+use tracing::trace;
 
 use crate::pipelines::processors::transforms::aggregator::aggregate_info::AggregateInfo;
 use crate::pipelines::processors::transforms::aggregator::aggregator_final_parallel::ParallelFinalAggregator;
@@ -97,7 +97,7 @@ where
             }
         }
 
-        info!(
+        trace!(
             "Convert to two level aggregator elapsed: {:?}",
             instant.elapsed()
         );
@@ -197,7 +197,7 @@ where
             }
         }
 
-        info!(
+        trace!(
             "Convert to two level aggregator elapsed: {:?}",
             instant.elapsed()
         );

src/query/settings/src/lib.rs

@@ -191,13 +191,13 @@ impl Settings {
             },
             // max_storage_io_requests_page_size
             SettingValue {
-                default_value: UserSettingValue::UInt64(512 * 1024),
+                default_value: UserSettingValue::UInt64(256 * 1024),
                 user_setting: UserSetting::create(
                     "max_storage_io_requests_page_size",
-                    UserSettingValue::UInt64(512 * 1024),
+                    UserSettingValue::UInt64(256 * 1024),
                 ),
                 level: ScopeLevel::Session,
-                desc: "The maximum bytes of a IO request read. By default the value is 512KB",
+                desc: "The maximum bytes of one IO request read. By default the value is 256KB",
                 possible_values: None,
             },
             // flight_client_timeout