Below example logging flexiblesearch class to separate file with time based trigger policy. Also we can add rollover strategy for removing old files.

log4j2.appender.FlexlogAppender.type=RollingFile log4j2.appender.FlexlogAppender.name=FlexlogAppender
log4j2.appender.FlexlogAppender.fileName=${HYBRIS_LOG_DIR}/Flexlog.log
log4j2.appender.FlexlogAppender.filePattern=${HYBRIS_LOG_DIR}/Flexlog.log-%d{yyyy-MM-dd}.log
log4j2.appender.FlexlogAppender.ImmediateFlush=true log4j2.appender.FlexlogAppender.layout.type=PatternLayout
log4j2.appender.FlexlogAppender.layout.pattern=%m%n log4j2.appender.FlexlogAppender.policies.type = Policies
log4j2.appender.FlexlogAppender.policies.time.type = TimeBasedTriggeringPolicy log4j2.appender.FlexlogAppender.policies.time.interval = 1000000
log4j2.appender.FlexlogAppender.policies.time.modulate = true log4j2.logger.flexible.name = de.hybris.platform.jalo.flexiblesearch
log4j2.logger.flexible.level = DEBUG log4j2.logger.flexible.appenderRef.stdout.ref = FlexlogAppender log4j2.logger.flexible.additivity = false