I have my open table cache set to 1800 and I have a total of 1112 tables. MySQL Tuning Primer reports that 100% of my table cache is used yet my table cache hit rate is 5%. I understand that this happens due to concurrent connections all opening tables. I think I should raise the cache limit. I understand that the cache size is limited by the file descriptor limit of my operating system, but are there any other practical limitations I should be aware of?
Searching Google or this very website yields mostly posts explaining the connection-factor or come up with indecisive answers.
My question: can I safely increase the open table cache limit? Is there a maximum?