今天登錄服務(wù)器發(fā)現(xiàn)報(bào)錯(cuò)，報(bào)錯(cuò)內(nèi)容為：-bash: fork: Cannot allocate memory

[root@proxy01 ~]# ssh proxy02
Last login: Thu Mar 17 17:42:20 2022 from 192.168.80.2
-bash: fork: Cannot allocate memory
-bash-4.2# ^C

問題原因

[root@proxy01 ~]# ssh proxy02
Last login: Thu Mar 17 17:47:32 2022 from 192.168.80.2
查看最大進(jìn)程數(shù)
[root@proxy02 ~]# sysctl kernel.pid_max
kernel.pid_max = 32768
查看進(jìn)程數(shù)
[root@proxy02 ~]# ps -eLf | wc -l
32528
確認(rèn)是進(jìn)程數(shù)滿了導(dǎo)致的

問題解決

修改最大進(jìn)程數(shù)后系統(tǒng)恢復(fù)
[root@proxy02 ~]# echo 1000000 > /proc/sys/kernel/pid_max
永久生效
[root@proxy02 ~]# echo "kernel.pid_max=1000000 " >> /etc/sysctl.conf
[root@proxy02 ~]# sysctl -p
...
kernel.pid_max = 1000000
[root@proxy02 ~]# sysctl kernel.pid_max
kernel.pid_max = 1000000