We converted from a badly deteriorating "home grown" server that
was made up of java + jetty ( + rsync for replication) + an older
version of lucene.
I make some comparisons of SOLR vs. "prior" using "" notes below.
I parsed 2 days worth of SOLR logs to determine:
Max queries/sec: 8.8
Avg queries/sec: 5.4
Number (re)indexed / day: 3372
Index size: 1.1gb [vs. 26gb]
Number of document fields searched on a quoted unqualified query:
5 [vs. 677] *
one 4gb RAM dual core cpu
[vs. three 4gb RAM dual core cpu (readers) and one 8gb RAM 2 dual
core cpus (writer)]
Solr hardly touches our disks, load avg stays around 0.5, typically.
"sar" shows we average 85% idle!
Solr seems quicker to respond, overall, and much more stable.
We can reindex our entire set of 575K items in about 2 hours
(where we are limited more by the "crawling" of our 190 servers for
XML than Solr).
With our current configuration, we can show index changes on our live