try to yum install php56w-mcrypt and system gave me this error
libmcrypt-2.5.8-13.el7.x86_64: [Errno 5] [Errno 12] Cannot allocate memory
php56w-mcrypt-5.6.5-1.w7.x86_64: [Errno 5] [Errno 12] Cannot allocate memory
I ran a check on free -m
total used free shared buffers cached
Mem: 490 421 68 8 3 42
-/+ buffers/cache: 376 113
Swap: 0 0 0
and top
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
9756 mysql 20 0 727588 81556 0 S 0.3 16.2 1:04.61 mysqld
11089 root 20 0 0 0 0 S 0.3 0.0 0:16.25 kworker/0:2
1 root 20 0 129396 2020 576 S 0.0 0.4 0:05.88 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:00.16 ksoftirqd/0
5 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0H
7 root rt 0 0 0 0 S 0.0 0.0 0:00.00 migration/0
8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_bh
9 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcuob/0
10 root 20 0 0 0 0 S 0.0 0.0 0:01.82 rcu_sched
11 root 20 0 0 0 0 R 0.0 0.0 0:02.10 rcuos/0
12 root rt 0 0 0 0 S 0.0 0.0 0:00.91 watchdog/0
13 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 khelper
14 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kdevtmpfs
15 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 netns
16 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 writeback
17 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kintegrityd
not sure where else to check.
Am using DigitalOcean VPS with RAM 512MB, the $5/month plan
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I had the same issue and since mine is not a production server I just stopped Apache and MariaDB, ran the updates then started them backup.
As you can see, you only have 113mb free, which is all used by yum when you run it.