pruning parameter in the ~/.firmachain/config/app.toml file. The following pruning state settings are available:everything: Prune all saved states other than the current state.nothing: Save all states and delete nothing.default: Save the last 100 states and the state of every 10,000th block.custom: Specify pruning settings with the pruning-keep-recent, pruning-keep-every, and pruning-interval parameters.default mode which is the recommended setting for most environments.Ubuntu 20.04 LTS, and the default value of this OS is 1024.)
However, if you open /etc/security/limits.conf and modify the value as can be seen in the code below, you can raise the limit of the nofile feature