Reduce the Default Pool Size for the Schema Generator #841 (#842)

* Reduce the Default Pool Size for the Schema Generator #841 Signed-off-by: Paul Bastide <pbastide@us.ibm.com> * Reduce the Default Pool Size for the Schema Generator #841 Signed-off-by: Paul Bastide <pbastide@us.ibm.com> * Reduce the Default Pool Size for the Schema Generator #841 Signed-off-by: Paul Bastide <pbastide@us.ibm.com>
LinuxForHealth · Mar 24, 2020 · 04110ec · 04110ec
1 parent df8c703
commit 04110ec
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Showing 2 changed files with 4 additions and 3 deletions.
diff --git a/fhir-persistence-schema/src/main/java/com/ibm/fhir/schema/app/Main.java b/fhir-persistence-schema/src/main/java/com/ibm/fhir/schema/app/Main.java
@@ -1,5 +1,5 @@
 /*
- * (C) Copyright IBM Corp. 2019
+ * (C) Copyright IBM Corp. 2019, 2020
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -119,7 +119,7 @@ public class Main {
     private IDatabaseTranslator translator = new Db2Translator();
 
     // The connection pool and transaction provider to support concurrent operations
-    private int maxConnectionPoolSize = FhirSchemaConstants.DEFAULT_POOL_SIZE / 2;
+    private int maxConnectionPoolSize = FhirSchemaConstants.DEFAULT_POOL_SIZE;
     private PoolConnectionProvider connectionPool;
     private ITransactionProvider transactionProvider;
 

diff --git a/fhir-persistence-schema/src/main/java/com/ibm/fhir/schema/control/FhirSchemaConstants.java b/fhir-persistence-schema/src/main/java/com/ibm/fhir/schema/control/FhirSchemaConstants.java
@@ -11,8 +11,9 @@
  */
 public class FhirSchemaConstants {
 
+    // A lower pool size is selected as default to limit the likelihood of contention on the DBMS.
     // Standard connection/thread pool size
-    public static final int DEFAULT_POOL_SIZE = 80;
+    public static final int DEFAULT_POOL_SIZE = 1;
 
     // Size of string columns in the search tables. DSTU2 was 511
     public static final int MAX_SEARCH_STRING_BYTES = 1024;