My domain name is gadgetgyaan.com. I have installed the Worpdress 3.9 manually and made a new database. The problem is that after publishing a post if a tweet the post then the server load increases significantly. I am on VPS Level 3 and the load remains under 1. But when I tweet it reaches 5. Also sharing on other social networks causes increase in sever load. I am faced the same issue on previous version of WordPress.
I have performed the test with the default theme and deactivated all the plugins.
And how to Optimize the index.php and admin-ajax.php since these two are using high cpu.
Please reply ASAP.