Hi, I experience a very strange problem, when using the jdbc driver with ssh's local port forwarding: ssh -v -L 4321:dbserver:5432 user@dbserver SELECT statements show about the same latency as without port-forwarding (and even decreased latency when compression is enabled), but sometimes UPDATE/DELETE statements take seconds to complete. The other time they are as fast as they should be. When I connect to postgres without port-forwarding the update statements consistently take only a few milliseconds. Any idea what the reason could be, I've tested it with two different ssh clients (one java, and openssh) both show the same behaviour. Could it be some buffering on the server side, to make data transfer more efficient? Could it be because selects usually send a lot of data back to the client, buffering doesn't hurt - but for update/delete usually only a acknoledgement is sent back and buffering starts to be an issue? Thank you in advance, Clemens Btw the java-based client seems to be waiting for data while it executes the statements: java.net.SocketInputStream.socketRead0(Native Method) java.net.SocketInputStream.read(SocketInputStream.java:129) org.postgresql.core.VisibleBufferedInputStream.readMore(VisibleBufferedInputStream.java:135) org.postgresql.core.VisibleBufferedInputStream.ensureBytes(VisibleBufferedInputStream.java:104) org.postgresql.core.VisibleBufferedInputStream.read(VisibleBufferedInputStream.java:73) org.postgresql.core.PGStream.ReceiveChar(PGStream.java:259) org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1620) org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:257) - locked org.postgresql.core.v3.QueryExecutorImpl@17b1683
