Hi Humm
if both db is in full recovery and environment with issue doesn't have full recovery than you must check your transactions while you call your sp. You can use below query to check transaction which is filling your t-log file most.
Transaction Filling Log Space in Sql server
/************Transaction causing logspace filled most in database**************/
SELECT tst.[session_id],
s.[login_name] AS [Login Name],
DB_NAME (tdt.database_id) AS [Database],
tdt.[database_transaction_begin_time] AS [Begin Time],
tdt.[database_transaction_log_record_count] AS [Log Records],
tdt.[database_transaction_log_bytes_used] AS [Log Bytes Used],
tdt.[database_transaction_log_bytes_reserved] AS [Log Bytes Rsvd],
SUBSTRING(st.text, (r.statement_start_offset/2)+1,
((CASE r.statement_end_offset
WHEN -1 THEN DATALENGTH(st.text)
ELSE r.statement_end_offset
END - r.statement_start_offset)/2) + 1) AS statement_text,
st.[text] AS [Last T-SQL Text],
qp.[query_plan] AS [Last Plan]
FROM sys.dm_tran_database_transactions tdt
JOIN sys.dm_tran_session_transactions tst
ON tst.[transaction_id] = tdt.[transaction_id]
JOIN sys.[dm_exec_sessions] s
ON s.[session_id] = tst.[session_id]
JOIN sys.dm_exec_connections c
ON c.[session_id] = tst.[session_id]
LEFT OUTER JOIN sys.dm_exec_requests r
ON r.[session_id] = tst.[session_id]
CROSS APPLY sys.dm_exec_sql_text (c.[most_recent_sql_handle]) AS st
OUTER APPLY sys.dm_exec_query_plan (r.[plan_handle]) AS qp
where DB_NAME (tdt.database_id) = 'tempdb'ORDER BY [Log Bytes Used] DESC;
/***************************************************************************************************/
------> Please modify database name
Thanks
Saurabh Sinha
http://saurabhsinhainblogs.blogspot.in/
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SQL Log File Growth rate
