Ceph

ceph osd pool set cache target_max_objects 10

It looks like a value below 1024 will cause x/1024 == 0 which will be used for division.

Program received signal SIGFPE, Arithmetic exception.
[Switching to Thread 0x7fffe2ef3700 (LWP 51408)]
0x0000000000829087 in ReplicatedPG::agent_choose_mode (this=0x1cdc000) at osd/ReplicatedPG.cc:11129
11129 (pool.info.target_max_objects / divisor);
(gdb) bt
#0 0x0000000000829087 in ReplicatedPG::agent_choose_mode (this=0x1cdc000) at osd/ReplicatedPG.cc:11129
#1 0x00000000007c9c33 in ReplicatedPG::agent_setup (this=0x1cdc000) at osd/ReplicatedPG.cc:10734
#2 0x00000000007de447 in ReplicatedPG::on_activate (this=0x1cdc000) at osd/ReplicatedPG.cc:9121
#3 0x000000000074a521 in PG::RecoveryState::Active::react (this=0x19da2c0, evt=...) at osd/PG.cc:6423
#4 0x00000000007af2c0 in react<PG::RecoveryState::Active, boost::statechart::event_base, void const*> (evt=..., stt=..., eventType=<optimized out>)
at /usr/include/boost/statechart/custom_reaction.hpp:42