Hi I'm having following phenonemon...if dtml-in with a sort on lots of data or I do a big ZCatalog-query then all transactions to Zope (2.4.0 on Sun Intel-PC) (after that transaction) wait for the first "big" transaction to finish before returning their results. This is naturally not so good if I want to have a site with about 50 concurrent users... I'd say the problem looks, as if I have only one thread returning results. Since I can't believe that Zope cannot handle parallel requests it must be my config. I already played arround with giving Zope more threads but it didn't change the behaviour. I use Apache 1.3.19 and Zope 2.4.0. Apache does SSL and the virtual hosting. Apache runs as Proxy Pass. I use the VirtualHostMonster on the Zope side to do the pathtranslation. I havn't checked things like FastCGI or PCGI. I'm desperate for an answer but I don't know where to look. So I'd be thankful for any help. Thanx Oliver -- GMX - Die Kommunikationsplattform im Internet. http://www.gmx.net