[clue-tech] MySQL server reply packets delayed/lost under network congestion?

[David L. Anselmi]

Jim Ockers wrote:
> service    no-hog start delay         hog-start-delay
> ftp        .1ms                       ~1ms
> mysql      1ms                        ~10-15 SECONDS
> http       .1ms                       ~1ms
> 
> There is something strange we noticed in the packet trace.  The client 
> initiates the TCP 3 way handshake to the server, and then instead of 
> sending the banner the server tries to connect back to the client on 
> port 3306 (it sends a SYN).

I'll take a look at the trace if you send it.

Could be a bug in MySQL.  strace may help.  If you don't want to find it 
yourself you might post what you've got to the MySQL dev list.  Or check 
their bug list.

Dave