How much data can a Qlikview tool handle? what would be it's effect on speed of the tool?
We've been using tens of GB of reasonably complex data without too much trouble. Main issue is having enough RAM in the web server, as each additional user of the large QV application will need a fair amount of RAM for her/himself. I recall ca 10% of application size per user being mentioned somewhere?, I.e. for an application using 30 GB of RAM, each user using it will use another 3 GB of RAM (assuming that 10% number is correct).
But there is a lot of performance to gain by designing the data model and application properly, doing set analysis over lots of rows in a chart is a no-no from performance point of view. Much preferred (if possible given the problem at hand) to do the aggregation (or whatever needs to be done) in the load script.