PDQ

I noticed a performance decrease instead of a performance increase when using PDQ with creating indexes. The create indexes are done one/with: * Informix 7.23.UC6 on Solaria 2.5.1. * System: SUN E4000 with 6 CPU's and 5.3 GB internal memory. * Informix has four CPU, NOAGE is set, AFFINITY is set for all 4 Informix CPU's. * Tables are fragmented round robbin on two dbspaces. * Indexes has their own dbspace and disk/diskchannel * All dbspaces are on raw devices During the creations of indexes nobody is using the system. When using PDQ the index creation takes around 10% longer. That is not what I want. Monitoring onstat -g mgm tells me hat I have PDQ resources enough. And other measurements show me that the system has plenty of resources left. The question is this a feature of Informix 7.23.UC6 or do I something wrong. Regards, Albert Wisse