rdisp/max_vm_sgc_lazy_time is a SAP Parameter attribute which is used to control Max. time to contribute to a shared GC information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
Clearing up 'shared closures' happens in the VMC (Virtual Machine
Container) in the framework of a 'Shared GC' (SGC). If this is triggered
then all existing VMs have to participate. VMs that are currently
executing a Java program are notified by an event and usually
participate in the SGC immediately. But there is also the situation
where this is not the case. A maximum time period can be configured so
that individual VMs cannot stop an SGC indefinitely. If this is exceeded
by a VM then it is restarted.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.