I just upgraded from Lion. I noticed that mds was using 200 - 300 MB of ram. Is this normal? I dont remember being that high in Lion. I reindexed spotlight and its stayed right about there. I then restarted and it immediately jumped to about 80 - 90 mb. is this normal?
It's likely that it's not finished indexing. If a drive is constantly active or your CPU utilization is high (possibly with increased temps and fan speed) when you're not running any major apps, you can check to see if Spotlight is
indexing by looking at the Menu Bar icon:
(not indexing)
(indexing) (pulsing dot)
When it's indexing, you may also see increased CPU and RAM usage by the
mds and
mdworker processes in Activity Monitor.
Just let it finish the process and it should return to normal. If it doesn't appear to be indexing, try re-indexing your drive:
Spotlight: How to re-index folders or volumes
If that fails to index, enter the following command in Terminal:
sudo mdutil -i on "/Volumes/your drive name"