If you were linked here by documentation for a plugin that you’re using on your Bukkit/Spigot server, you can control the logging behavior of the plugin using its config.yml file.
Basic documentation of all available options is shown below. Your plugin likely has additional information regarding what portions of the plugin’s logging facilities are configurable.
# This is the section within which all SLF4Bukkit configuration options is
# contained. Its name is the same regardless of what the plugin's name is.
slf4j:
# Default log level for all plugin logging activity. Possible values are
# "trace", "debug", "info", "warn", or "error".
#
# If the plugin logs any "trace" or "debug" messages, they will be logged by
# the plugin as "info" severity, but you'll see the actual severity in the
# log message. This is due to a Bukkit logging limitation.
#
# If not specified, default is "info".
defaultLogLevel: info
# Shows an "[SLF4J]" header for every message logged through SLF4Bukkit.
#
# If not specified, default is "false".
showHeader: false
# Shows the name of each thread that is logging via SLF4Bukkit. You probably
# don't want this information unless you're helping troubleshoot a plugin.
#
# If not specified, default is "false".
showThreadName: false
# Shows the full logger name (e.g. "info.ronjenkins.bukkit.MyPlugin").
#
# If not specified, default is "false".
showLogName: false
# Shows the short logger name, which is the short Java package name format
# (e.g. a logger named "info.ronjenkins.bukkit.MyPlugin" would have a short
# name of "i.r.b.MyPlugin".
#
# If not specified, default is "true".
showShortLogName: true
# This section controls logging levels for individual loggers.
log:
# For each element in this section, the key is the full logger name and the
# value is the logging level for that logger. Possible logging levels are
# the same as what's available for the "slf4j.defaultLogLevel" property.
#
# The documentation for your plugin should elaborate on what logger names
# are available. As a general rule, you won't need to specify levels for
# specific loggers.
info.ronjenkins.bukkit.MyPlugin: debug
info.ronjenkins.SomeOtherLogger: warn