I guess that one system is 32bit (virtual memory limit is 2 GiB per
process).
D
On 2020-03-01 21:59, aeris wrote:
   Try decreasing
maximum size of these databases:
 
https://www.knot-dns.cz/docs/2.9/singlehtml/index.html#database-section
 Also if you can add build time options, add --with-conf-mapsize=10
 configure parameter. 
 OK thanks, reducing journal-db-max-size to 250MB and the service
 starts.
 But how is it possible a 512MB RAM machine can start knot without this
 database limit but a 1GB machine can't? Both are arm arch and run the
 exactly
 same config & zone.
 Regards,