Cron <root@na> /usr/lib64/sa/sa2 -A

I am getting email from Cron <root@na> /usr/lib64/sa/sa2 -A about End of system activity file unexpected

 

End of system activity file unexpected, Why happening high amount of system activity? Is this any issues having on my VPS server?

I do run the "ls -lah /var/log/sa" command.

Code:

[root@na sa]# ls -lah /var/log/sa
total 24K
drwxr-xr-x   2 root root 4.0K Aug 30 11:30 .
drwxr-xr-x. 15 root root 4.0K Aug 30 11:18 ..
-rw-r--r--   1 root root 4.2K Aug 30 11:30 sa30
-rw-r--r--   1 root root 6.7K Aug 30 11:22 sar30

I do manually running the "/usr/lib64/sa/sa2 -A" command

Code:

[root@na sa]# /usr/lib64/sa/sa2 -A
[root@na sa]#

/var/log/sa/sa30 format are not readable.

Code:

–Õq!

Please let me know that How to fixing compatible readable format.

I do run "sar" command to see it working.

Code:

[root@na sa]# sar
Linux 3.10.0-514.26.2.el7.x86_64 (na.mysite.com)    08/30/2017      _x86_64_(10 CPU)

11:30:01 AM     CPU     %user     %nice   %system   %iowait    %steal     %idle
11:40:01 AM     all      3.33      0.00      0.46      0.10      0.06     96.04
Average:        all      3.33      0.00      0.46      0.10      0.06     96.04
[root@na sa]#