Index: oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/rdb/RDBDocumentStore.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/rdb/RDBDocumentStore.java	(date 1419083741000)
+++ oak-core/src/main/java/org/apache/jackrabbit/oak/plugins/document/rdb/RDBDocumentStore.java	(revision )
@@ -337,7 +337,7 @@
     // a) single characters will fit into 3 bytes
     // b) a surrogate pair (two Java characters) will fit into 4 bytes
     // thus...
-    private static int CHAR2OCTETRATIO = 3;
+    private int char2OctectRatio = 3;
 
     // capacity of DATA column
     private int dataLimitInOctets = 16384;
@@ -434,9 +434,11 @@
                         + tableName
                         + " (ID varchar(512) not null primary key, MODIFIED bigint, HASBINARY smallint, MODCOUNT bigint, CMODCOUNT bigint, DSIZE bigint, DATA varchar(16384), BDATA blob)");
             } else if ("MySQL".equals(dbtype)) {
+                this.char2OctectRatio = 4;
+                this.dataLimitInOctets = 12288 * char2OctectRatio;
                 stmt.execute("create table "
                         + tableName
-                        + " (ID varchar(512) not null primary key, MODIFIED bigint, HASBINARY smallint, MODCOUNT bigint, CMODCOUNT bigint, DSIZE bigint, DATA varchar(16384), BDATA mediumblob)");
+                        + " (ID varchar(190) not null primary key, MODIFIED bigint, HASBINARY smallint, MODCOUNT bigint, CMODCOUNT bigint, DSIZE bigint, DATA varchar(12288), BDATA mediumblob)");
             } else if ("Oracle".equals(dbtype)) {
                 // see https://issues.apache.org/jira/browse/OAK-1914
                 this.dataLimitInOctets = 4000;
@@ -840,7 +842,7 @@
             // every 16th update is a full rewrite
             if (isAppendableUpdate(update) && modcount % 16 != 0) {
                 String appendData = SR.asString(update);
-                if (appendData.length() < this.dataLimitInOctets / CHAR2OCTETRATIO) {
+                if (appendData.length() < this.dataLimitInOctets / char2OctectRatio) {
                     try {
                         success = dbAppendingUpdate(connection, tableName, document.getId(), modified, hasBinary, modcount,
                                 cmodcount, oldmodcount, appendData);
@@ -916,11 +918,17 @@
                 Boolean hasBinary = flag == null ? false : flag.intValue() == NodeDocument.HAS_BINARY_VAL;
                 Long modcount = (Long) document.get(MODCOUNT);
                 Long cmodcount = (Long) document.get(COLLISIONSMODCOUNT);
-                dbInsert(connection, tableName, document.getId(), modified, hasBinary, modcount, cmodcount, data);
+                boolean result = dbInsert(connection, tableName, document.getId(), modified, hasBinary, modcount, cmodcount, data);
+                if (!result) {
+                    LOG.error("Error Id : " + data);
-            }
-            connection.commit();
+                }
+                connection.commit();
+            }
+/*
+            connection.commit();
+*/
         } catch (SQLException ex) {
-            LOG.debug("insert of " + ids + " failed", ex);
+            LOG.error("insert of " + ids + " failed", ex);
             this.ch.rollbackConnection(connection);
             throw new DocumentStoreException(ex);
         } finally {
@@ -1082,7 +1090,7 @@
             stmt.setObject(si++, cmodcount == null ? 0 : cmodcount, Types.BIGINT);
             stmt.setObject(si++, data.length(), Types.BIGINT);
 
-            if (data.length() <  this.dataLimitInOctets / CHAR2OCTETRATIO) {
+            if (data.length() <  this.dataLimitInOctets / char2OctectRatio) {
                 stmt.setString(si++, data);
                 stmt.setBinaryStream(si++, null, 0);
             } else {
@@ -1184,7 +1192,7 @@
             stmt.setObject(si++, modcount, Types.BIGINT);
             stmt.setObject(si++, cmodcount == null ? 0 : cmodcount, Types.BIGINT);
             stmt.setObject(si++, data.length(), Types.BIGINT);
-            if (data.length() <  this.dataLimitInOctets / CHAR2OCTETRATIO) {
+            if (data.length() <  this.dataLimitInOctets / char2OctectRatio) {
                 stmt.setString(si++, data);
                 stmt.setBinaryStream(si++, null, 0);
             } else {