A daily increase in wordpress database site

[ghinaaltal]

Hello guys,
please can anyone help me!
I am the admin of a new wordpress website that is still new and have no post or news, the website is hosted on Linux, Ubuntu server. I noticed lately that the data base of the website is increasing rapidly day by day without performing any thing on the site..
and the wp_options table is full of this records:
_wp_session_expires_71d531600d0bdfdde3f08b1f580c5c7b
_wp_session_9998b4cdeb00519b1bced28c43702bef
_wp_session_expires_9998b4cdeb00519b1bced28c43702bef
_wp_session_ffe442604b947bb0893a03d3d7d70c73
_wp_session_41f9a4c1866351f75cef324c80014899
_wp_session_expires_ffe442604b947bb0893a03d3d7d70c73
_wp_session_expires_41f9a4c1866351f75cef324c80014899
_wp_session_9735cdb65c9e46c6a7e54ddefd76f0a7
_wp_session_expires_9735cdb65c9e46c6a7e54ddefd76f0a7
_wp_session_2530eafcd5d0790982c17f4d6c02500b
_wp_session_expires_2530eafcd5d0790982c17f4d6c02500b
_wp_session_590b5fca3e1b057511f5b0822edb969e
_wp_session_expires_590b5fca3e1b057511f5b0822edb969e
_wp_session_7b8d8eda21fe050e1067627a50c58571
_wp_session_expires_7b8d8eda21fe050e1067627a50c58571

how can I solved this issue, I highly appreciate any help there..
and please to show me in details how to solve it as am new in websites

[pippinsplugins]

Please see my answer here #2031