Message-Id: <10704.124051@fatcity.com> From: "ARUN K C" Date: Fri, 08 Dec 2000 16:30:55 Subject: Re: Asynch IO and truss question

one more thing i forgot is check the stats using qiostat on that particular file

if it shows stats if it is showing 0  then it is not enabled

this is incremental there is a command to reset this but i have forgotten i will let u know

fox$qiostat LOG5BLINK_01.ORA
                          OPERATIONS          FILE BLOCKS    AVG TIME(ms)

FILE NAME               READ     WRITE      READ     WRITE   READ  WRITE

LOG5BLINK_01.ORA       73036    252987   4669500   4669462    1.3    5.6



 

>From: paquette stephane
>Reply-To: ORACLE-L@fatcity.com
>To: Multiple recipients of list ORACLE-L
>Subject: Asynch IO and truss question
>Date: Thu, 07 Dec 2000 19:29:44 -0800
>
>Hi all,
>
>Since the sys admin is available 15min per week, I've
>started to play with truss to make sure asynch IO was
>done.
>This is on Solaris 2.7, Oracle 8.1.6 and Veritas Quick
>IO.
>I've done truss -fl on the the dbwr process.
>It's giving me
>28529/1: Received signal #14, SIGALRM, in
>semop() [caught]
>28529/1: semop(37224452, 0xFFFFFFFF7FFFDCAC, 1)
> Err#91 ERESTART
>28529/1: sigprocmask(SIG_BLOCK,
>0xFFFFFFFF7FFFD770, 0x00000000) = 0
>28529/1: times(0xFFFFFFFF7FFFD6A0)
> = 243599308
>28529/1: sigprocmask(SIG_UNBLOCK,
>0xFFFFFFFF7FFFD770, 0x00000000) = 0
>28529/1: getcontext(0xFFFFFFFF7FFFD3C0)
>28529/1: setcontext(0xFFFFFFFF7FFFD3C0)
>28529/1: sigprocmask(SIG_BLOCK,
>0xFFFFFFFF7FFFDAE0, 0x00000000) = 0
>28529/1: setitimer(ITIMER_REAL,
>0xFFFFFFFF7FFFD9B0, 0x00000000) = 0
>28529/1: sigprocmask(SIG_UNBLOCK,
>0xFFFFFFFF7FFFDAB0, 0x00000000) = 0
>28529/1: kaio(AIOWRITE, 402, 0x381C8C000,
>16384, 0x0342000001E92B70) Err#48 ENOTSUP
>28529/1: lwp_cond_signal(0xFFFFFFFF7C8EBF70)
> = 0
>28529/140: lwp_cond_wait(0xFFFFFFFF7C8EBF70,
>0xFFFFFFFF7C8EBF80, 0x00000000) = 0
>28529/140: pwrite(402, "0202\0\0\080\r\b\00E
>}1A".., 16384, 0x03420000) = 16384
>28529/1: kaio(AIOWAIT, 0xFFFFFFFF7FFFD710)
> = 1
>28529/140: kaio(AIONOTIFY, -2184159392)
> = 0
>28529/1: getcontext(0xFFFFFFFF7FFFD8D0)
>28529/1: sigprocmask(SIG_BLOCK,
>0xFFFFFFFF7FFFDAE0, 0x00000000) = 0
>28529/1: times(0xFFFFFFFF7FFFD9B0)
> = 243599310
>28529/1: setitimer(ITIMER_REAL,
>0xFFFFFFFF7FFFD9B0, 0x00000000) = 0
>28529/1: sigprocmask(SIG_UNBLOCK,
>0xFFFFFFFF7FFFDA80, 0x00000000) = 0
>28529/1: semop(37224452, 0xFFFFFFFF7FFFDCAC, 1)
>(sleeping...)
>28529/2: kaio(6, 0x00000000, 0x00000000,
>0x00000000, 0x00000000, 0x00000000) (sleeping...)
>28529/3: lwp_cond_wait(0xFFFFFFFF7D58DF70,
>0xFFFFFFFF7D58DF80, 0x00000000) (sleeping...)
>28529/4: lwp_cond_wait(0xFFFFFFFF7D57BF70,
>0xFFFFFFFF7D57BF80, 0x00000000) (sleeping...)
>...
>
>I've read on metalink that the error 48 is because of
>the vol_maxio buffer being smaller than
>db_file_direct_io_count*db_block_size.
>Anybody can confirm ?
>
>Also, should I be concerned with the 91 error ?
>
>TIA
>
>
>=====
>Stephane Paquette
>DBA Oracle
>stephane_paquette@yahoo.com
>
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