On 08/14/2015 11:46 AM, Shaheen Bakhtiar wrote:
Good morning, Rebuilt our IMAP server from scratch using Cyrus 2.4.17 on FC22 x86_64. The server is a single process 2.3GH 8 core AMD 64bit with 4G of memory. Ever since the rebuild we are experience an ever growing number of imapd processes, when we first boot the server we have ~200 using 2.4G of memory. In about 3 to 4 days we have ~1500 imapd processes taking up all available physical memory and all all available swap memory (an additional 4G). and our logs are filled with messages like: Aug 14 06:26:01 postoffice kernel: Out of memory: Kill process 15427 (imapd) score 1 or sacrifice child Aug 14 06:26:01 postoffice kernel: Killed process 15427 (imapd) total-vm:179648kB, anon-rss:7756kB, file-rss:672kB SNMP Graphs of what’s happening: https://www.dropbox.com/s/7bnu82h54alrzkz/postoffice%20OOM.png?dl=0 I’m not ruling out a DoS, but the logs from the tcpdump (currently) don’t support that, neither do the SNMP from the router. Checking the IDS, but I find it more than coincidental that this started happening after we upgraded. We had no such issues prior to the upgrade. Any ideas would be greatly appreciated, Shawn ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe: https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus
Try something like this to see if many of the processes are from the same IP address and/or user.
for foo in `ps -ef | grep imapd | awk '{ print $2 }'`;do lsof -p $foo|egrep 'ESTABLISHED|cyrus.index';done
begin:vcard fn:Patrick Boutilier n:Boutilier;Patrick org:;Nova Scotia Department of Education adr:;;2021 Brunswick Street;Halifax;NS;B3K 2Y5;Canada email;internet:boutilpj@xxxxxxxxxxx title:WAN Communications Specialist tel;work:902-424-6800 tel;fax:902-424-0874 version:2.1 end:vcard
---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe: https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus
