Following reply by iljitsch van Beijnum about queueing delays in IP, looked to be a good little summary.
The answer is that delay is only one aspect of performance, another important one is packet loss. As link bandwidth increases, queuing delays decrease proportionally. So if you’re using your 10 Mbps link with average 500 byte packets at 98% capacity, you’ll generally have a 49-packet queue. (queue = utilization / (1 - utilization)) Our 500 byte packets are transmitted at 0.
Using version 1:
$ snmpget -c COMMSTRING -M /usr/local/share/snmp/mibs -v 1 \ -m USAGE-MIB:PROXY-MIB:REDLINE-STATS-MIB:REDLINE-STATS-MIB:REDLINE-CONFIG-MIB \ hostname REDLINE-STATS-MIB::sessActive.0 Error in packet Reason: (noSuchName) There is no such variable name in this MIB. Failed object: REDLINE-STATS-MIB::sessActive.0 Using version 2 (2c):
$ snmpget -c COMMSTRING -M /usr/local/share/snmp/mibs -v 2c \ -m USAGE-MIB:PROXY-MIB:REDLINE-STATS-MIB:REDLINE-STATS-MIB:REDLINE-CONFIG-MIB \ hostname REDLINE-STATS-MIB::sessActive.0 REDLINE-STATS-MIB::sessActive.0 = Counter64: 12247 Slightly annoying that - but makes certain sense
A little video, thin on detail of course, but hints at some home truths on building/designing scale-able applications (and i’d go so far to say that they are applicable to ALL applications not just webapps)
Of course, I know Ben Rockwood like’s his solaris and F5′s – but that’s not going to surprise many (and I just LOVE f5s)
And here’s a blog entry with the details on /how/ that’s done:-
Spring and snowing – of course this is normal for the time of year – honest! Nothing to do with any change in climate or anything cough
This little snippet will give you a new little window for all those recent applications you launch – I seem to have picked up a habit for closing applications down when I stop working with them for an hour or two (pages etc.)
$ write com.apple.dock persistent-others -array-add \ '{ "tile-data" = { "list-type" = 1; }; "tile-type" = "recents-tile"; }' $ killall Dock