问题
I recently upgraded a JRuby 1.7.x based Rails 4.2.5 Web application to JRuby 9.1.9.0. When I deploy the to a web server, page loads take up to 60sec. I profiled the code and the bulk of the time is being spentt in the ActionDispatch::Session::CookieStore call method. I suspect this bottlenect is potentially related to jopenssl gem's encrypt/decrypt being slow but I have not found any help articles or solutions online.
Any insight into this issue, possible options to configure JRuby would be appreciated. The issue did not occur in JRuby 1.7.x
回答1:
export JRUBY_OPTS=-J-Djava.security.egd=file:/dev/./urandom should do it
(or a jruby-openssl upgrade to 0.9.21)
来源：https://stackoverflow.com/questions/45111894/after-upgrade-to-jruby-9-1-9-0-rails-cookiestore-very-slow-when-handling-encryp