On 24/04/2021 21:01, mohamed almeshal wrote:

my question is what is the measures and precaution for deleting sessions from radacct .

Use a cron job or similar to tidy entries where acctstoptime is not null (i.e. an Accounting-Stop has been received) as they are finished sessions. You can also remove sessions where acctupdatetime is older than a few multiplications of your acct-interval (e.g. maybe anything over a day old), as they are sessions where you've probably missed the Stop. If the NAS is regularly not sending stops or updates then you need to fix that.

it's seems to be dealing with deletion of the session may cause some issue or may not ?

Not really. The standard SQL queries should create a new session on the first Interim-Update if the start never arrived (albeit missing some information). It may matter if you are querying the data for other reasons, such as simultaneous-use or billing. -- Matthew