We have a perfMemory warning about 'Insufficient space for shared memory file'; this currently prints misleading info about 'java.io.tmpdir' and misses to print the directory, so we get no clue where exactly insufficient space is.

Current Example output :
OpenJDK 64-Bit Server VM warning: Insufficient space for shared memory file:
   31671
Try using the -Djava.io.tmpdir= option to select an alternate temp location.

The printing of '31671' does not really help me much.
And java.io.tmpdir WAS set in the execution the output is from, but is not used here (probably intentionally).