Thanks for your reply.
> MySQL itself doesn't generate UDP traffic (the protocol runs
> over TCP/IP). However, MySQL relies on DNS unless you've specified
> - --skip-name-resolve when you started the server. DNS
> travels over UDP.
I did not specify --skip-name-resolve.
> You also mention you're using a NetAPP. NFS (unless you tell
> it to run over TCP/IP) also uses UDP. If you didn't upgrade
> MySQL, and only the filer and the filesystem, I would start
> looking at _that_.
I am suspecting NetApp, but I fail to understand in which way I should
upgrade MySQL. I mean: we were already running it with the data /on/
NetApp, it was merely a NetApp patch that was applied.
> If you can rule out the NetAPP filesystem
> generating more UDP traffic, then look for DNS issues. Did
> your "OS boys" look at the destination for these packets
> (port # and host), as that would tell you a _lot_ about why
> they're being sent.
I guess that would include the IP address of the DNS server. I'll see if
that brings me any further.
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