I really don't understand what this code is saying, if possible, please help me take a look.
[root@di ~]# dmesg|grep -E "kill|redis|oom"
[203414.638529] python invoked oom-killer: gfp_mask=0x201da, order=0, oom_score_adj=0
[203414.638609] [<ffffffff9b3cd1d5>] oom_kill_process+0x2d5/0x4a0
[203414.638612] [<ffffffff9b3ccb9d>] ? oom_unkillable_task+0xcd/0x120
[203414.638824] [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
[203414.638879] [ 1454] 1003 1454 143976 12440 200 33192 0 redis-server
[749700.588255] php-fpm invoked oom-killer: gfp_mask=0x201da, order=0, oom_score_adj=0
[749700.588318] [<ffffffff9b3cd1d5>] oom_kill_process+0x2d5/0x4a0
[749700.588320] [<ffffffff9b3ccb9d>] ? oom_unkillable_task+0xcd/0x120
[749700.588572] [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
[749700.588623] [ 1454] 1003 1454 189032 9717 279 19747 0 redis-server
[749700.591938] BT-Task invoked oom-killer: gfp_mask=0x201da, order=0, oom_score_adj=0
[749700.591969] [<ffffffff9b3cd1d5>] oom_kill_process+0x2d5/0x4a0
[749700.591971] [<ffffffff9b3ccb9d>] ? oom_unkillable_task+0xcd/0x120
[749700.592093] [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
[749700.592133] [ 1454] 1003 1454 189032 9717 279 19747 0 redis-server
[749728.749567] php-fpm invoked oom-killer: gfp_mask=0x201da, order=0, oom_score_adj=0
[749728.749606] [<ffffffff9b3cd1d5>] oom_kill_process+0x2d5/0x4a0
[749728.749609] [<ffffffff9b3ccb9d>] ? oom_unkillable_task+0xcd/0x120
[749728.749825] [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
[749728.749885] [ 1454] 1003 1454 189032 8650 279 20859 0 redis-server
[749728.750003] Out of memory: Kill process 1454 (redis-server) score 40 or sacrifice child
[749728.750043] Killed process 1454 (redis-server), UID 1003, total-vm:756128kB, anon-rss:34600kB, file-rss:0kB, shmem-rss:0kB
[844978.042187] BT-Task invoked oom-killer: gfp_mask=0x201da, order=0, oom_score_adj=0
[844978.042242] [<ffffffff9b3cd1d5>] oom_kill_process+0x2d5/0x4a0
[844978.042245] [<ffffffff9b3ccb9d>] ? oom_unkillable_task+0xcd/0x120
[844978.042444] [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
[844978.042518] [19961] 1003 19961 129128 15534 175 12563 0 redis-server
[844978.051257] systemd-journal invoked oom-killer: gfp_mask=0x201da, order=0, oom_score_adj=0
[844978.051290] [<ffffffff9b3cd1d5>] oom_kill_process+0x2d5/0x4a0
[844978.051292] [<ffffffff9b3ccb9d>] ? oom_unkillable_task+0xcd/0x120
[844978.051415] [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
[844978.051471] [19961] 1003 19961 129128 15534 175 12563 0 redis-server
[1228772.184369] mariadbd invoked oom-killer: gfp_mask=0x201da, order=0, oom_score_adj=0
[1228772.184436] [<ffffffff9b3cd1d5>] oom_kill_process+0x2d5/0x4a0
[1228772.184439] [<ffffffff9b3ccb9d>] ? oom_unkillable_task+0xcd/0x120
[1228772.184631] [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
[1228772.184707] [19961] 1003 19961 219240 8071 325 44176 0 redis-server
[1229011.902793] php-fpm invoked oom-killer: gfp_mask=0x201da, order=0, oom_score_adj=0
[1229011.902840] [<ffffffff9b3cd1d5>] oom_kill_process+0x2d5/0x4a0
[1229011.902842] [<ffffffff9b3ccb9d>] ? oom_unkillable_task+0xcd/0x120
[1229011.903011] [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
[1229011.903082] [19961] 1003 19961 219240 3881 327 47865 0 redis-server
[1229011.903183] Out of memory: Kill process 19961 (redis-server) score 71 or sacrifice child
[1229011.903222] Killed process 19961 (redis-server), UID 1003, total-vm:876960kB, anon-rss:15524kB, file-rss:0kB, shmem-rss:0kB
[2214579.110446] php-fpm invoked oom-killer: gfp_mask=0x201da, order=0, oom_score_adj=0
[2214579.110532] [<ffffffff9b3cd1d5>] oom_kill_process+0x2d5/0x4a0
[2214579.110534] [<ffffffff9b3ccb9d>] ? oom_unkillable_task+0xcd/0x120
[2214579.110803] [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name