Hi Pawel,
well your issue (not the root cause) seems to be pretty obvious.
PROCESS 11: LGWR
…
SO: 0xf0612868, type: 10, owner: 0xf0861770, flag: INIT/-/-/0x00 if: 0x1 c: 0x1
proc=0xf34f2580, name=FileOpenBlock, file=ksfd.h LINE:6448, pg=0
(FOB) 0xf0612868 flags=264202 fib=0xf0861770 incno=0 pending i/o cnt=1
fname=/oracle/XIP/origlogA/log_g13m1.dbf
fno=0 lblksz=512 fsiz=102400
…
SO: 0xf221aea8, type: 14, owner: 0xf34f2580, flag: INIT/-/-/0x00 if: 0x1 c: 0x1
proc=0xf34f2580, name=channel handle, file=ksr2.h LINE:367, pg=0
(broadcast handle) 0xf221aea8 flag: (2) ACTIVE SUBSCRIBER,
owner: 0xf34f2580 - ospid: 10403
event: 7, last message event: 14,
last message waited event: 14,
next message: (nil)(0), messages read: 1
channel: (0xf2235600) scumnt mount lock [name: 157]
scope: 1, event: 19, last mesage event: 14,
publishers/subscribers: 0/17,
messages published: 1
heuristic msg queue length: 0
…
SO: 0xf370ecb0, type: 4, owner: 0xf34f2580, flag: INIT/-/-/0x00 if: 0x3 c: 0x3
proc=0xf34f2580, name=session, file=ksu.h LINE:12624, pg=0
(session) sid: 95 ser: 1 trans: (nil), creator: 0xf34f2580
flags: (0x51) USR/- flags_idl: (0x1) BSY/-/-/-/-/-
flags2: (0x409) -/-/INC
DID: , short-term DID:
txn branch: (nil)
oct: 0, prv: 0, sql: (nil), psql: (nil), user: 0/SYS
ksuxds FALSE at location: 0
service name: SYS$BACKGROUND
Current Wait Stack:
0: waiting for 'log file parallel write'
files=0x1, blocks=0x6f, requests=0x1
wait_id=1592 seq_num=1593 snap_id=1
wait times: snap=6 min 44 sec, exc=6 min 44 sec, total=6 min 44 sec
wait times: max=infinite, heur=6 min 44 sec
wait counts: calls=0 os=0
in_wait=1 iflags=0x5a0
There are 3 sessions blocked by this session.
Dumping one waiter:
inst: 1, sid: 33, ser: 3
wait event: 'switch logfile command'
p1: ''=0x0
p2: ''=0x0
p3: ''=0x0
row_wait_obj#: 4294967295, block#: 0, row#: 0, file# 0
min_blocked_time: 403 secs, waiter_cache_ver: 163
…
Unfortunately you have not included the short stack dums (adding level 256) in that trace file, but it should be obvious that writing to redo log file should not take 6 min and 44 secs (and still waiting).
What is your I/O storage subsystem? Do you use NFS? What kind of file system (and mount options) do you use? Please include the short stack traces as well or just execute pstack on LGWR when this issue occurs.
Regards
Stefan