In Jaspersoft Studio Max pages governor property.
It's not defined anywhere explicitly in studio and is usually defined on report level. You can check if you have defined it in studio. Go to Window -> Preferences -> Jaspersoft Studio -> Properties. Search for net.sf.jasperreports.governor.max.pages and net.sf.jasperreports.governor.max.pages.enabled.
Report level. Select report object, go to Properties tab -> Advanced tab -> Edit report properties. Search for these governors there.