redis - Loading dump.rdb fails -

i want transfer redis database 1 server another. transferred dump.rdb after save command new server , placed dbfile. when start redis server, seems working fine while; used_memory increases file loads:

127.0.0.1:6379> info  # memory used_memory:3142064944 used_memory_human:2.93g used_memory_rss:0 used_memory_peak:3142064944 used_memory_peak_human:2.93g used_memory_lua:33792 mem_fragmentation_ratio:0.00 mem_allocator:jemalloc-3.6.0  # persistence loading:1  127.0.0.1:6379> info  # memory used_memory:4164419680 used_memory_human:3.88g used_memory_rss:0 used_memory_peak:4164419680 used_memory_peak_human:3.88g used_memory_lua:33792 mem_fragmentation_ratio:0.00 mem_allocator:jemalloc-3.6.0  # persistence loading:1 

after few seconds process stops:

could not connect redis @ 127.0.0.1:6379: connection refused 

i think restarting redis server restarts db loading scratch , cannot finished

127.0.0.1:6379> keys * (error) loading redis loading dataset in memory 

there nothing in redis log file.

we had similar error our redis database , turned out memory issue. increasing amount of memory solved issue. can check logs see if redis needs more memory or not.