Sun Performance and Tuning: Java™ and the Internet, Second Edition

Setting Default Limits

The default limits are shown by the sysdef -i command, which lists the values in hexadecimal, as shown in Figure 14-9.

Figure 14-9. Example Systemwide Resource Limits Shown by sysdef

% sysdef -i ... Soft:Hard Resource Infinity:Infinity cpu time Infinity:Infinity file size 1fefe000:1fefe000 heap size 800000: ff00000 stack size Infinity:Infinity core file size 40: 400 file descriptors Infinity:Infinity mapped memory

The hard limits for data size and stack size vary. Some older machines with the Sun-4 MMU can map only 1 Gbyte of virtual address space, so stack size is restricted to 256 Mbytes and data size is restricted to 512 Mbytes. For machines with the SPARC Reference MMU, the maximums are 2 Gbytes each.

To increase ...