Large persist database causes client to disconnect

[ftapajos]

Considering a large persist database

-rw-------    1 mosquitt mosquitt  125.1M Sep 13 16:36 /var/mosquitto/mosquitto.db

And a client myclient connected via unix socket, trying to save the database while receiving a PINGREQ makes the client disconnect

Sep 13 16:36:52 mosquitto[23003]: 1726256212: Saving in-memory database to /var/mosquitto/mosquitto.db.
Sep 13 16:36:52 myclient: Client myclient sending PINGREQ
Sep 13 16:36:58 myclient: Client myclient sending CONNECT
Sep 13 16:36:59 mosquitto[23003]: 1726256219: Client myclient disconnected: Broken pipe.

Environment:
Mosquitto broker and libmosquittopp: 2.0.18

[Daedaluz]

@ralight this is an issue I also hit sometimes, mostly on slower systems and slow disks.