MDB_READERS_FULL: Environment maxreaders limit reached
Hello,
I have installed a KNOT DNS Authoriative server on a Debian Buster server. Since few weeks, I have this error when I trying to execute knotc command, like : error: failed to open configuration database '/var/lib/knot/confdb' (MDB_READERS_FULL: Environment maxreaders limit reached)
I have try to recreate the confdb from a conf-export output wihout success. After Knotd restart, I can use knotc but few time later, this error occur.
Debian : 10.3
Knot : knotd (Knot DNS), version 2.9.5
Deb package : 2.9.5-1cz.nicbuster1
Knot stats :
server.zone-count = 248
mod-stats.request-protocol[udp4] = 27
mod-stats.request-protocol[tcp4] = 372
mod-stats.server-operation[query] = 213
mod-stats.server-operation[ixfr] = 186
mod-stats.request-bytes[query] = 32056
mod-stats.request-bytes[other] = 41586
mod-stats.response-bytes[reply] = 48431
mod-stats.response-bytes[transfer] = 1308693
mod-stats.response-code[NOERROR] = 393
mod-stats.response-code[NXDOMAIN] = 6
Thanks