diff --git a/src/org/redkale/source/DataSqlSource.java b/src/org/redkale/source/DataSqlSource.java
index 04c10dce0..c12da3936 100644
--- a/src/org/redkale/source/DataSqlSource.java
+++ b/src/org/redkale/source/DataSqlSource.java
@@ -69,7 +69,7 @@ public abstract class DataSqlSource<DBChannel> extends AbstractService implement
     public DataSqlSource(String unitName, URL persistxml, Properties readprop, Properties writeprop) {
         final AtomicInteger counter = new AtomicInteger();
         this.threads = Integer.decode(readprop.getProperty(JDBC_CONNECTIONS_LIMIT, "" + Runtime.getRuntime().availableProcessors() * 16));
-        int maxconns = Math.max(8, Integer.decode(readprop.getProperty(JDBC_CONNECTIONS_LIMIT, "" + Runtime.getRuntime().availableProcessors() * 200)));
+        int maxconns = Math.max(8, Integer.decode(readprop.getProperty(JDBC_CONNECTIONS_LIMIT, "" + Math.min(1000, Runtime.getRuntime().availableProcessors() * 200))));
         if (readprop != writeprop) {
             this.threads += Integer.decode(writeprop.getProperty(JDBC_CONNECTIONS_LIMIT, "" + Runtime.getRuntime().availableProcessors() * 16));
             maxconns = 0;