I am using ubuntu 12.04 and koha 3.8.7. I have about 1000-2000 books. My search about 2s. your problem is, maybe, large database, next ram is low (check it with free -m), then check %cpu is working! Make sure zebra is working ps aux | grep zebrasrv and is enabled in Koha!
Best regards! Nguyen Quoc Uy _______________________________________________ Koha mailing list http://koha-community.org Koha@lists.katipo.co.nz http://lists.katipo.co.nz/mailman/listinfo/koha