We have the following situation: client upgraded from Tridion 5.3 SP1 to 2011 SP1, but is asking questions about the (high) memory consumption of the TcmSearchHost.exe process. It uses up to 900 MB of memory. The search config is default, no tweaking has been done to the SOLR config so far.
I've compared this with amount of RAM used to our other Tridion 2011 projects, and it's indeed higher while the size of the lucene indexes is more or less the same.
Is this still an acceptable memory usage, or could one of you think of ways to optimize/reasons for the 'high' RAM consumption?