Hi All, I'm not quite sure if i'm doing something wrong here but what is see if i performing a 2 table join on a primary key field is tablea and tableb work fine yet tablec which has less data crashes the daemon. SELECT a.ip_dst as ip_dst, b.tcp_dport as tcp_dport, count(*) as num from "myschema".tablea a LEFT JOIN "myschema".tableb b ON (a.guid = b.guid) WHERE b.tcp_dport IS NOT NULL GROUP BY a.ip_dst, b.tcp_dport ORDER BY num DESC LIMIT 20; This one works fine. However when i perform the join from tablea to tablec I get the following. sql>SELECT a.ip_dst as ip_dst, b.udp_dport as udp_dport, count(*) as num from "myschema".tablea a LEFT JOIN "myschema".tablec b ON (a.guid = b.guid) WHERE b.udp_dport IS NOT NULL GROUP BY a.ip_dst, b.udp_dport ORDER BY num DESC LIMIT 20 more>; Connection terminated I've added alot more detail to the pastebin link. I had the same issue with 11.13.5 after upgrading i have run into the same thing also. http://pastebin.com/m4XseSnH If you want to schema information to reproduce please just email me off list. Regards, Brian Hood