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shuwenwei pushed a commit to branch transferSchemaTreeInBatches
in repository https://gitbox.apache.org/repos/asf/iotdb.git
The following commit(s) were added to refs/heads/transferSchemaTreeInBatches by
this push:
new 861c6659009 modify MemoryEstimationHelper
861c6659009 is described below
commit 861c66590096d4082f57d2c7c37fb1ec7914ba1e
Author: shuwenwei <[email protected]>
AuthorDate: Fri Jul 25 12:34:38 2025 +0800
modify MemoryEstimationHelper
---
.../db/queryengine/execution/MemoryEstimationHelper.java | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git
a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/MemoryEstimationHelper.java
b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/MemoryEstimationHelper.java
index 39a98c80a12..8e68a31fc03 100644
---
a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/MemoryEstimationHelper.java
+++
b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/MemoryEstimationHelper.java
@@ -53,10 +53,20 @@ public class MemoryEstimationHelper {
public static final long SHALLOW_SIZE_OF_HASHMAP =
RamUsageEstimator.shallowSizeOfInstance(HashMap.class);
- public static final long SHALLOW_SIZE_OF_HASHMAP_ENTRY = 32;
+ public static long SHALLOW_SIZE_OF_HASHMAP_ENTRY;
public static final long SHALLOW_SIZE_OF_CONCURRENT_HASHMAP =
RamUsageEstimator.shallowSizeOfInstance(ConcurrentHashMap.class);
- public static final long SHALLOW_SIZE_OF_CONCURRENT_HASHMAP_ENTRY = 24;
+ public static long SHALLOW_SIZE_OF_CONCURRENT_HASHMAP_ENTRY;
+
+ static {
+ Map<Integer, Integer> map = new HashMap<>(1);
+ map.put(1, 1);
+ Map.Entry<Integer, Integer> next = map.entrySet().iterator().next();
+ SHALLOW_SIZE_OF_HASHMAP_ENTRY = RamUsageEstimator.shallowSizeOf(next);
+ map = new ConcurrentHashMap<>(map);
+ SHALLOW_SIZE_OF_CONCURRENT_HASHMAP_ENTRY =
+ RamUsageEstimator.shallowSizeOf(map.entrySet().iterator().next());
+ }
private MemoryEstimationHelper() {
// hide the constructor
