If you set min-spare == max-spare you are likely to get children created and deleted in rapid succession, the default is 1 and 2.
Indeed I setup the default 1 and 2 which avoid the message about the adjust and decrease number of spamd children
OPTIONS="--create-prefs --min-spare 1 --max-spare 2 --max-children 5 Bye, Bruno -- Linux Counter # 353844 https://linuxcounter.net/user/353844.html