查了好久也查不出所以然，看到數據庫有45G，清理下，ok。zabbix-server服務起來了。
17513:20191224:092628.167 7f76bd8cd000-7f76bd8ce000 rw-p 00000000 00:00 0
17513:20191224:092628.167 7ffef170c000-7ffef172d000 rw-p 00000000 00:00 0 [stack]
17513:20191224:092628.167 7ffef17dc000-7ffef17de000 r-xp 00000000 00:00 0 [vdso]
17513:20191224:092628.167 ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
17513:20191224:092628.167 ================================
17513:20191224:092628.167 Please consider attaching a disassembly listing to your bug report.
17513:20191224:092628.167 This listing can be produced with, e.g., objdump -DSswx zabbix_server.
17513:20191224:092628.167 ================================
17503:20191224:092628.168 One child process died (PID:17513,exitcode/signal:1). Exiting ...
17503:20191224:092630.172 syncing history data...
17503:20191224:092630.279 syncing history data done
17503:20191224:092630.279 syncing trend data...
17503:20191224:092630.303 syncing trend data done
17503:20191224:092630.303 Zabbix Server stopped. Zabbix 3.4.15 (revision 86739).
過一會又出現zabbix-server自動重啓。後來想到可能是我啓用了系統自帶的mail功能，網上有說過這個有bug。
於是關閉這個模塊再truncate一下歷史數據庫，ok。
觀察下zabbix-server的運行狀態
watch -n 1 -d "systemctl status zabbix-server"
[root@gt-zabbix yum.repos.d]# systemctl status zabbix-server
● zabbix-server.service - Zabbix Server
Loaded: loaded (/usr/lib/systemd/system/zabbix-server.service; enabled; vendor preset: disabled)
Active: active (running) since Tue 2019-12-24 10:56:49 CST; 15min ago
Process: 34639 ExecStop=/bin/kill -SIGTERM $MAINPID (code=exited, status=1/FAILURE)
Process: 34842 ExecStart=/usr/sbin/zabbix_server -c $CONFFILE (code=exited, status=0/SUCCESS)
Main PID: 34844 (zabbix_server)
CGroup: /system.slice/zabbix-server.service
├─34844 /usr/sbin/zabbix_server -c /etc/zabbix/zabbix_server.conf
├─34878 /usr/sbin/zabbix_server: configuration syncer [synced configuration in 1.394036 sec, idle 60 sec]
├─34879 /usr/sbin/zabbix_server: alerter #1 [sent 0, failed 0 alerts, idle 667.706364 sec during 667.986064 sec]
├─34880 /usr/sbin/zabbix_server: alerter #2 [sent 0, failed 0 alerts, idle 677.474511 sec during 678.971590 sec]
├─34881 /usr/sbin/zabbix_server: alerter #3 [sent 0, failed 0 alerts, idle 672.695920 sec during 673.010181 sec]
├─34882 /usr/sbin/zabbix_server: housekeeper [startup idle for 30 minutes]
├─34883 /usr/sbin/zabbix_server: timer #1 [processed 106 triggers, 0 events in 0.002007 sec, 0 maintenances in 0.002024 sec, idle 30 sec]
├─34884 /usr/sbin/zabbix_server: http poller #1 [got 0 values in 0.000521 sec, idle 5 sec]
├─34885 /usr/sbin/zabbix_server: discoverer #1 [processed 0 rules in 0.000000 sec, performing discovery]
├─34886 /usr/sbin/zabbix_server: history syncer #1 [synced 0 items in 0.000048 sec, idle 1 sec]
├─34887 /usr/sbin/zabbix_server: history syncer #2 [synced 0 items in 0.000054 sec, idle 1 sec]
├─34888 /usr/sbin/zabbix_server: history syncer #3 [synced 0 items in 0.000065 sec, idle 1 sec]
├─34889 /usr/sbin/zabbix_server: history syncer #4 [synced 254 items in 0.015404 sec, idle 1 sec]
├─34890 /usr/sbin/zabbix_server: escalator #1 [processed 0 escalations in 0.000257 sec, idle 3 sec]
├─34891 /usr/sbin/zabbix_server: proxy poller #1 [exchanged data with 0 proxies in 0.000018 sec, idle 5 sec]
├─34892 /usr/sbin/zabbix_server: self-monitoring [processed data in 0.000016 sec, idle 1 sec]
├─34893 /usr/sbin/zabbix_server: task manager [processed 0 task(s) in 0.000110 sec, idle 5 sec]
├─34894 /usr/sbin/zabbix_server: poller #1 [got 167 values in 4.084475 sec, idle 1 sec]
├─34895 /usr/sbin/zabbix_server: poller #2 [got 59 values in 0.149098 sec, getting values]
├─34896 /usr/sbin/zabbix_server: poller #3 [got 0 values in 0.000028 sec, idle 1 sec]
├─34897 /usr/sbin/zabbix_server: poller #4 [got 45 values in 0.144095 sec, idle 1 sec]
├─34898 /usr/sbin/zabbix_server: poller #5 [got 42 values in 0.177383 sec, getting values]
├─34899 /usr/sbin/zabbix_server: unreachable poller #1 [got 2 values in 6.013010 sec, getting values]
├─34900 /usr/sbin/zabbix_server: trapper #1 [processed data in 0.000288 sec, waiting for connection]
├─34901 /usr/sbin/zabbix_server: trapper #2 [processed data in 0.000296 sec, waiting for connection]
├─34902 /usr/sbin/zabbix_server: trapper #3 [processed data in 0.000751 sec, waiting for connection]
├─34903 /usr/sbin/zabbix_server: trapper #4 [processed data in 0.000782 sec, waiting for connection]
├─34904 /usr/sbin/zabbix_server: trapper #5 [processed data in 0.001437 sec, waiting for connection]
├─34905 /usr/sbin/zabbix_server: icmp pinger #1 [pinging hosts]
├─34906 /usr/sbin/zabbix_server: alert manager #1 [sent 0, failed 0 alerts, idle 5.007279 sec during 5.007342 sec]
├─34907 /usr/sbin/zabbix_server: preprocessing manager #1 [queued 0, processed 967 values, idle 4.989516 sec during 5.000585 sec]
├─34908 /usr/sbin/zabbix_server: preprocessing worker #1 started
├─34909 /usr/sbin/zabbix_server: preprocessing worker #2 started
├─34910 /usr/sbin/zabbix_server: preprocessing worker #3 started
├─47412 sh -c /usr/sbin/fping -C3 2>&1 </tmp/zabbix_server_34885.pinger;/usr/sbin/fping6 -C3 2>&1 </tmp/zabbix_server_34885.pinger;
├─47413 /usr/sbin/fping -C3
├─47415 sh -c /usr/sbin/fping -C3 2>&1 </tmp/zabbix_server_34905.pinger;/usr/sbin/fping6 -C3 2>&1 </tmp/zabbix_server_34905.pinger;
└─47416 /usr/sbin/fping -C3
Dec 24 10:56:49 gt-zabbix.gtland.cn systemd[1]: Starting Zabbix Server...
Dec 24 10:56:49 gt-zabbix.gtland.cn systemd[1]: zabbix-server.service: Supervising process 34844 which is not our child. We'll most likely not notice when it exits.
Dec 24 10:56:49 gt-zabbix.gtland.cn systemd[1]: Started Zabbix Server.
