Hi,
On 11/27/2017 07:57 PM, tcook@blackducksoftware.com wrote:
> The following bug has been logged on the website:
>
> Bug reference: 14932
> Logged by: Todd Cook
> Email address: tcook@blackducksoftware.com
> PostgreSQL version: 10.1
> Operating system: CentOS Linux release 7.4.1708 (Core)
> Description:
>
> It hangs on a table with 167834 rows, though it works fine with only 167833
> rows. When it hangs, CTRL-C does not interrupt it, and the backend has to
> be killed to stop it.
>
Can you share the query and data, so that we can reproduce the issue?
Based on the stack traces this smells like a bug in the simplehash,
introduced in PostgreSQL 10. Perhaps somewhere in tuplehash_grow(),
which gets triggered for 167834 rows (but not for 167833).
regards
--
Tomas Vondra http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services