How to check online redo log groups in Oracle

Join V$LOG with V$LOGFILE to see every online redo log group: group number, thread, member paths, whether the log has been archived, its status (CURRENT, ACTIVE, INACTIVE), and size in MB.

COL member   FORMAT a56
SET PAGESIZE 299 LINES 299

SELECT l.group#, l.thread#,
       f.member,
       l.archived,
       l.status,
       (l.bytes / 1024 / 1024) AS "Size (MB)"
FROM   v$log     l,
       v$logfile f
WHERE  f.group# = l.group#
ORDER BY 1, 2;