executing java from php in rhel/centos - not enough space for code cache

The apache user could run java programs just fine from the command line, but even the simplest java command in php would fail:

<?php
system('java -version');
?>

with the error 

Error occurred during initialization of VM
Could not reserve enough space for code cache. 

We already had the setsebool -P httpd_ssi_exec=1 option on, so that Apache had permission to execute whatever. Strangely, however, this "memory" issue is also due, somehow to selinux. Disabling selinux temporarily (e.g. with echo 0 >/selinux/enforce) or setting setsebool -P httpd_disable_trans=1 fixes the problem. I'd like less of a sledgehammer solution, but messing with other selinux settings does not seem to have any effect.


Edit: As a commenter below just indicated, you can use setsebool -P httpd_execmem=1 to disable this setting. If that doesn't work, well, back to the sledgehammer.