I currently have the following entry in
/etc/security/limits.d/90-nproc.conf based on Mongo DB's recommended ulimit settings.
mongod soft nofile 64000 mongod soft nproc 64000
I need to massively increase the number of permitted file descriptors to - say -
999999. In normal situations only a few thousand files are likely to be accessed per day. The reason for the large number of files is the way the WiredTiger storage engine works. It uses several files per collection, of which I have many thousands.
Are there any negative impacts to this situation?
Is it detrimental to system performance to have a huge number of file descriptors open, but largely unused?