Use the following query to find the spid of the oldest open transaction in a transaction log that has reached its last-chance threshold:
use master
go
select dbid, spid from syslogshold
where dbid = db_id("name_of_database")
For example, to find the oldest running transaction on the pubs2 database:
select dbid, spid from syslogshold
where dbid = db_id ("pubs2")
dbid spid
------ ------
7 1
