It looks normal; most of the time queue is empty - these peaks are caused by housekeeping process which runs every hour (it loads quite bit amount of data, do vacuum (on postgresql), etc).
DB Writer queue size indicates problem only when it's value is above zero most of the time.
However, if db load will be too high, you can try to increase housekeeping intervals in server config - this should help a bit.
DB Writer queue size indicates problem only when it's value is above zero most of the time.
However, if db load will be too high, you can try to increase housekeeping intervals in server config - this should help a bit.