Hi, I have a Mac Mini (2GHz Core 2 Duo, 4GB ram and Lion 10.7.3) that I'm using as a server and home theater pc. I leave it running 24 hours a day and it hosts a Plex server, Transmission (Bit Torrent client) and time machine backups. I also run an Air Video server and Mobile Mouse Pro server (for control using my iPhone). Lately the machine has slowed to a crawl making it completely unusable until I reboot. After a reboot, it will run fine for a few days then slow again. In activity moniter, I can see syslogd using 100% of the cpu. From what I understand, syslogd is the error reporting function in the console. When I check the console, I see this message spamming 500+ times every second:
1/28/12 2:06:35.025 PM mDNSResponder: mDNS_Deregister_internal: 21 6.8.0.E.D.5.E.F.F.F.A.C.5.5.A.220.127.116.11.1.1.F.B.2.D.18.104.22.168.0.0.2.ip6.arpa. PTR Apple-TV-2116.local. already marked kDNSRecordTypeDeregistering
1/28/12 2:06:35.025 PM mDNSResponder: *** process 14 exceeded 500 log message per second limit - remaining messages this second discarded ***
From what I understand, mDNSResponder is related to Bonjour and can be disabled but this is the one machine on the network that I actually want Bonjour enabled (screen sharing and transmission web ui). I have four other Macs on the network and this is the only one having this problem. I also have a jailbroken AppleTV on the network that runs a Plex client to watch my content on the other TV in the house. If I unplug the AppleTV during the slow down, it doesn't stop the spamming. I also wonder about calling it "Apple-TV-2116.local" in the console because when I ssh into the AppleTV to update apps, it's address is simply "Apple-TV.local".
I disabled sleep on the AppleTV because I thought it was getting a new address/ip everytime it woke but that hasn't stopped the issue. I googled the error and only found one other forum post regarding the issue and there was no solution. I'm tempted to take the AppleTV off the network for a week to see if that resolves the issue but it does get used fairly often and none of the other macs on the network are having problems so I think it's something specific to my mac mini.