Hi, All, Regarding mysql, I have problems on concurrent updates in the following settings. I get a mysql server containing one database with 512 tables. There is also a client who send concurrent updates to the server, each update by a thread. As I increase the number of concurrent updates, I have found the client program complains error "com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'test.viewtable_610_611' doesn't exist". However, as I checked afterwards on the server, table "test.viewtable_610_611" do exist. I am a bit confused about the problem here, and any idea is appreciated. Thanks Regards, Richard