we believe we have increased the max open file descriptors for the root user. This was done by adding this line to /etc/security/limits.conf:
* - nofile 2048
We think we've confirmed that the root user's limit was increased because we can tell (not described here) that our application (solr - which is run by root) has 1098 files open. However, we can't tell for sure how many open files the root user is allowed. We would expect this command to work, but it doesn't seem to be:
$ sudo -u root -s "ulimit -Sn" 1024
Any ideas? Thanks!