(iotdb) branch dev/1.3 updated: [To dev/1.3] Changed the default MQTT handler size to 1/2 number of processors & Fixed some default parameters when core number is 1 (#16363) (#16365)

[justinchen]

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justinchen pushed a commit to branch dev/1.3
in repository https://gitbox.apache.org/repos/asf/iotdb.git


The following commit(s) were added to refs/heads/dev/1.3 by this push:
     new 36584ce141a [To dev/1.3] Changed the default MQTT handler size to 1/2 
number of processors & Fixed some default parameters when core number is 1 
(#16363) (#16365)
36584ce141a is described below

commit 36584ce141a6a1fec731b335a6ea05c3544f7c31
Author: Caideyipi <87789683+caidey...@users.noreply.github.com>
AuthorDate: Mon Sep 8 15:09:14 2025 +0800

    [To dev/1.3] Changed the default MQTT handler size to 1/2 number of 
processors & Fixed some default parameters when core number is 1 (#16363) 
(#16365)
    
    * fix
    
    * fix
---
 .../datanode/src/main/java/org/apache/iotdb/db/conf/IoTDBConfig.java  | 2 +-
 .../src/main/java/org/apache/iotdb/db/conf/IoTDBDescriptor.java       | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git 
a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/conf/IoTDBConfig.java 
b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/conf/IoTDBConfig.java
index 3d2b6b6fa5e..2a85be595c3 100644
--- 
a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/conf/IoTDBConfig.java
+++ 
b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/conf/IoTDBConfig.java
@@ -109,7 +109,7 @@ public class IoTDBConfig {
   private int mqttPort = 1883;
 
   /** The handler pool size for handing the mqtt messages. */
-  private int mqttHandlerPoolSize = 1;
+  private int mqttHandlerPoolSize = Math.max(1, 
Runtime.getRuntime().availableProcessors() >> 1);
 
   /** The mqtt message payload formatter. */
   private String mqttPayloadFormatter = "json";
diff --git 
a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/conf/IoTDBDescriptor.java
 
b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/conf/IoTDBDescriptor.java
index c79c67a409e..bfc47bf58e0 100644
--- 
a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/conf/IoTDBDescriptor.java
+++ 
b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/conf/IoTDBDescriptor.java
@@ -586,7 +586,7 @@ public class IoTDBDescriptor {
                 "degree_of_query_parallelism", 
Integer.toString(conf.getDegreeOfParallelism()))));
 
     if (conf.getDegreeOfParallelism() <= 0) {
-      conf.setDegreeOfParallelism(Runtime.getRuntime().availableProcessors() / 
2);
+      conf.setDegreeOfParallelism(Math.max(1, 
Runtime.getRuntime().availableProcessors() / 2));
     }
 
     conf.setMergeThresholdOfExplainAnalyze(
@@ -2730,7 +2730,7 @@ public class IoTDBDescriptor {
                 "continuous_query_thread_num",
                 Integer.toString(conf.getContinuousQueryThreadNum()))));
     if (conf.getContinuousQueryThreadNum() <= 0) {
-      
conf.setContinuousQueryThreadNum(Runtime.getRuntime().availableProcessors() / 
2);
+      conf.setContinuousQueryThreadNum(Math.max(1, 
Runtime.getRuntime().availableProcessors() / 2));
     }
 
     conf.setContinuousQueryMinimumEveryInterval(