Bill Moran <wmoran at collaborativefusion.com> writes:
> (Very) Occasionally, we see these errors from Slony:
> ERROR  remoteListenThread_1: "listen "_schema_name"; " - ERROR:  could not read block 2 of relation

> To the tune of, seen it about 5 times in the last 6 months.  Now that we
> have a few examples of it, it seems to occur only when the server is
> under heavy load.

> Is there anything here to be concerned about?

Yeah, I'd say so.  But it's hard to guess what's happening since you
left out the most important part of the message, ie the kernel error
message.

> This is PostgreSQL 8.3 on FreeBSD 6, using the latest Slony 1.2  (although
> there have been varying versions over the last 6 months)

8.3.what?

			regards, tom lane