ER performance

Hi guys, A few weeks ago I got ER working on two servers between my companies. Since that, I'm experiencing a lot of performance issues that I'd never passed through before. The replication is working pretty fine but the server is completely overloaded. I think I've checked out everything, although I couldn't find out what might be happening. I just notice that cpu vps are getting overloaded according a "onstat -g glo" output. Also, locks on tables are taking longer than ever to be released. What should I check to solve that? ---- By the way, I have DELL Servers with 2 Intel XEON processors, with Hyperthreading enabled. On Linux, the system recognize 4 processors ('cause of hyperthreading). With that, should I use 2 or 4 CPU Vps? What's better? --- PS: I did a test, turning off all the 1500 replicates and the systems got faster as it they were before. Thanks in advance, Julio --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.568 / Virus Database: 359 - Release Date: 26/1/2004 sending to informix-list sending to informix-list