One Quickie

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So, what's hammering my network / disk? (DTrace->General)

Sometimes your harddrive is cheebling, or maybe your DSL modem lights are lit up like a Christmas Tree. The network activity monitor in Mavericks is beyond useless for figuring out exactly who the guilty party is. DTrace to the rescue. Run this rootstyles:

# dtrace -n 'syscall::read:entry { @read[execname] = sum(arg2); }' -n 'syscall::read_nocancel:entry { @read[execname] = sum(arg2); }'
dtrace: description 'syscall::read:entry ' matched 1 probe
dtrace: description 'syscall::read_nocancel:entry ' matched 1 probe
^C
...
  mdworker                                                   27699995
  dbfseventsd                                                37756854
  ocspd                                                     125588322
  storeagent                                                431376595

Sure enough, it's the MacAppStore program, downloading updates even though it's been told not to.