v$sysstat

Hi,

what is value signification  field in v$sysstat ?

It is mentioned in  documents (B14237-04) :

VALUE

NUMBER

Statistic value

What is realy Statistic value ?

For exemple in my query :

select name, value from v$sysstat   order by value desc

NAME

VALUE

---------------------------------------------------------------- ---------------------------------------

logical read bytes from cache

785801707520

what does show this value : 785801707520 ?

It is number of what ?

Thank you.