Crashed

Hi AternosTeam!

I have a little problem with my server!

We killed the Ender dragon in the hexxit modpack and the server was crashed ..

After the restart the server has lagging and we can't play any more ...

How can I solve the problem ?

We are played days and days ,but we lost this world and we don't have backup ?

Accidental Ram boost solve the problem ?

Yours Faithfully!
God bless you !

PS: Sorry for my bad english.

I don't have problem with my world just can't load the map normally and lagging .. We killed the enderdragon and the xp lagging the server