Yum problem on Centos 6.7

Question

I have installed php, mysql, httpd on my vps. But when I try upgrade php via yum I get the following error.

[root@ns1 home]# yum --enablerepo=remi update php

Package(s) php available, but not installed.
No Packages marked for Update

Then I am trying to install it with the following command but I get a "Segmentation fault".

[root@ns1 home]# yum --enablerepo=remi install php"

Yum update without a package is also not working:

[root@ns1 home]# yum update

Freeing read locks for locker 0x1ab: 23312/140158884435712
Freeing read locks for locker 0x1ad: 23312/140158884435712
Freeing read locks for locker 0x1b3: 23312/140158884435712
Freeing read locks for locker 0x1b4: 23312/140158884435712
Freeing read locks for locker 0x1b5: 23312/140158884435712
Freeing read locks for locker 0x1b6: 23312/140158884435712

I tried to clean cache but no luck.

cd /var/lib

rm __db*

rpm --rebuilddb

I waiting for your suggestions guys. Thank you very much!!!

Answer 1

It has been suggested here that it may be a lack of memory on the VPS and to try to resolve the issue by either shutting down running services or add a swap file. Then run

package-cleanup --cleandupes

prior to running other updates. One comment stated that stopping httpd service to do the yum updates worked.