In case you haven't noticed there has been a couple of changes.
After all the problems I had after power failure and VM knocking out my internet connection, I believe the site has been fairly stable for the last week or so.
I've rushed through the migration to the new server. In case you are wondering,
Old server - HP ML110 G5 with a dual core Intel Xeon 3065 with 4GB RAM running Windows 2008 R2. Storage was via Dell PERC 5i RAID controller and indexing site was on a Corsair CSSD-F80GB2-A 80GB SSD.
New server - Quad core with HT Xeon 1230v2 with 32GB RAM running Windows 2012 Server (what a terrible interface). Currently the O/S sites on a 500GB HDD with indexing site on a 256GB Samsung 840 Pro.
In terms of performance, the various stages of processing of 1 hour worth of headers is,
Number of groups checked is 125
Old New
download headers 52 min 15 min
Pattern match 3.5 min 1.5 min
Put into releases 1.7 min 1 min
Insert in DB 3 min 1 min
Look up NFO/RAR 25.3 min 15 min
Also I have started filtering out foreign posting as nobody is downloading them and it cuts out around 30% of posts and dropped download header time to around 12 minutes.
Finally I have done a back fill of a.b.ebook.magazines that somebody requested so there should be some useful stuff there (it mostly shows up as e-books).
There are some more updates coming once I have more time, will keep you updated as they happen.