Redis cannot allocate memory 1. 에러 상황 12:M 27 Aug 16:20:23.500 * Starting BGSAVE for SYNC with target: disk 12:M 27 Aug 16:20:23.500 # Can't save in background: fork: Cannot allocate memory 12:M 27 Aug 16:20:23.500 # BGSAVE for replication failed 12:M 27 Aug 16:20:29.083 * 1 changes in 900 seconds. Saving... 12:M 27 Aug 16:20:29.084 # Can't save in background: fork: Cannot allocate memory 12:M 2..