Usage Record documents should really be best as CLOBs.
diff --git a/taverna-server-webapp/src/main/java/org/taverna/server/master/usage/UsageRecord.java b/taverna-server-webapp/src/main/java/org/taverna/server/master/usage/UsageRecord.java
index b4a7da3..d71a983 100644
--- a/taverna-server-webapp/src/main/java/org/taverna/server/master/usage/UsageRecord.java
+++ b/taverna-server-webapp/src/main/java/org/taverna/server/master/usage/UsageRecord.java
@@ -93,8 +93,7 @@
 	private Date createDate;
 
 	@Persistent
-	@Column(name = "USAGE_RECORD", length = 32000)
-	// TODO Consider moving to BLOB (CLOB?) type
+	@Column(name = "USAGE_RECORD", jdbcType = "CLOB")
 	private String usageRecord;
 
 	public String getId() {