Zabbix tuning

https://catonrug.blogspot.com/2018/05/best-practice-of-zabbix-security-tips.html

https://blog.zabbix.com/reloading-configuration-cache/528/#:~:text=What%20is%20Zabbix%20configuration%20cache,customised%20by%20configuration%20parameter%20CacheUpdateFrequency.

• https://www.zabbix.com/documentation/current/en/manual/appendix/install/real_time_export```
• https://www.youtube.com/watch?v=pXrpi1Y0-Bw

### Option: ExportDir
#       Directory for real time export of events, history and trends in newline delimited JSON format.
#       If set, enables real time export.
#
# Mandatory: no
# Default:
# ExportDir=
ExportDir=/var/lib/zabbix/export/

### Option: ExportFileSize
#       Maximum size per export file in bytes.
#       Only used for rotation if ExportDir is set.
#
# Mandatory: no
# Range: 1M-1G
# Default:
# ExportFileSize=1G
ExportFileSize=1G

### Option: ExportType
#       List of comma delimited types of real time export - allows to control export entities by their
#       type (events, history, trends) individually.
#       Valid only if ExportDir is set.
#
# Mandatory: no
# Default:
# ExportType=events,history,trends