Archive for May, 2016

Pair “Listen queue overflow” FreeBSD errors with pcb

Just yesterday, after an upgrade to MySQL 5.7.12, saw plenty of errors were being logged in the system: sonewconn: pcb 0xfffff8006311c870: Listen queue overflow: 151 already in queue awaiting acceptance (1 occurrences) sonewconn: pcb 0xfffff8006311c870: Listen queue overflow: 151 already in queue awaiting acceptance (1 occurrences) sonewconn: pcb 0xfffff8006311c870: Listen queue overflow: 151 already in […]

Posted on May 19, 2016 at 10:40 am by sergeyt · Permalink · Leave a comment
In: FreeBSD

Have stalled snmpd in recvfrom()? Check Recv-Q

Not so while ago I had an issue with a monitoring system that paged about SNMP checks failing on a number of servers. Quick checking here and there (logs, strace, tcpdump, etc.) revealed that snmpd had stalled in recvfrom() without sending a single packet out in response to the constant queries from our monitoring system. […]

Posted on May 14, 2016 at 9:17 pm by sergeyt · Permalink · Leave a comment
In: Linux

Doing morning FreeBSD update

Applying FreeBSD patches is freaking easy. 

Posted on May 6, 2016 at 9:33 am by sergeyt · Permalink · Leave a comment
In: FreeBSD