You can view many performance metrics using the
log file viewer, but I don't think it displays available memory.
The only mechanism I can think of for viewing available system memory on the cRIO is to use
netconsole to get access to the operating system (vxWorks). I'm not sure if netconsole lets you send commands, if it doesn't you can try out
this node.js implementation.
Another alternative:
You should also be able to connect over the serial port. follow
these steps, using a terminal program like HyperTerminal, or putty.
Quote:
Connect a null-modem serial cable from your computers serial port to the controller serial port.
Configure a terminal program for 9600 bps, no parity bit, 8 data bits, and 1 stop bit.
Turn the CONSOLE OUT DIP switch on the controller to the ON position and reboot the controller. The terminal will display output and diagnostics during the boot process. When it is finished, the message “Welcome to LabVIEW Real-Time” will print.
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Once at vxWorks, use the memShow command to view free/used memory.
More info on vxWorks commands
here