Re: hanging for 30sec when checkpointing

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: "scott(dot)marlowe" <scott(dot)marlowe(at)ihs(dot)com>
Cc: "Goulet, Dick" <DGoulet(at)vicr(dot)com>, pgsql-admin(at)postgresql(dot)org
Subject: Re: hanging for 30sec when checkpointing
Date: 2004-02-10 01:13:01
Message-ID: 200402100113.i1A1D1229811@candle.pha.pa.us
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scott.marlowe wrote:
> On Mon, 9 Feb 2004, Goulet, Dick wrote:
>
> > Scott,
> >
> > If you feel it is necessary to apologize for such a minor
> > infraction of polite etiquette please come on over to Oracle-L. We have
> > harshness 10 times greater. Probably because there are so many
> > practioners and so many different points of view. We call them "Holy
> > Wars". The current blazing one is on RAID, the good, the bad, and the
> > ugly.
>
> Hehe, I grew up on FIDO net, so I know all about the flammage... :-)
>
> I can still remember the amiga versus atari ST holy wars of old.
>
> > BTW: From a Holy War on Oracle-L of similar topic. There is a
> > difference on how bad that lying IDE drive is depending on who the
> > vendor is, what system it's plugged into, and what OS is being used.
> > Some do a better job than others of "covering up" the lies. The other
> > chap may have one of those better systems, so from his point of view
> > it's "old fashioned misinformation". Doesn't mean it's not true, just
> > covered up better. Kind of like "Air Freshener".
>
> Well, it's interesting that during all the testing I and many others were
> doing last year, it appeared the escalade IDE RAID controllers were doing
> SOMETHING (no is quite sure if it was disabling write cache or not, but we
> guessed that was so) that made the IDE drives under them safe from the
> power off data loss issue that IDE drives seem to suffer from.

Maybe the RAID card has a battery-backed write cache.

--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073

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