Re: PF member current number of increments larger than the max

On Nov 6, 2018, at 3:03 PM, Evan Harris <auctionitis@xxxxxxxxx> wrote:

Hi Roger

I respectfully tend to disagree with this sentiment. I nearly always
recommend *NOMAX in conjunction with monitoring.
Main reasons:
- Over the journey I have seen more production problems due to "Maximum
file size reached..." messages than I have system overflows (though I have
seen a few of those)
- You can create files via WRKQRY (and I guess possibly SQL) that are
automatically created with no. of records *NOMAX so you are exposed to an
overflow via runaway queries anyway
- Systems are larger, so they generally take much longer to fill (but
conversely they are faster so runaway jobs can generate data much
quicker...)
- Monitoring is cheap and easy and you should do it anyway


On Wed, Nov 7, 2018 at 10:53 AM Roger Harman <roger.harman@xxxxxxxxxxx>
wrote:

VERY VERY VERY VERY VERY VERY bad choice.

Runaway/Rogue job = Disks Full = System Crash

Did I mention it's a bad choice?

Roger Harman
COMMON Certified Application Developer - ILE RPG on IBM i on Power







From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxx> on behalf of Booth
Martin <booth@xxxxxxxxxxxx>
Sent: Tuesday, November 6, 2018 1:05 PM
To: Midrange Systems Technical Discussion
Subject: Re: PF member current number of increments larger than the max

I am curious; why aren't you recommending *NOMAX?

On 11/6/2018 2:36 PM, Musselman, Paul wrote:
Jack--

No, it's not a 'troubled' file-- the data is fine. It is a sign that

whomever originally created the file didn't know how much data would be
stored, and under-estimated the file size.

The problem is that every time the file fills up an 'increment' of

records (ie every 100 records you add), the operating system will ask what
to do about it. Usually, the option to increment the file and continue is
taken. This has happened over 42,000 times!

The cure is to CHGPF and increase the base size of the file, and the

size of the increments. Since the file currently has more than 4 million
records, the changed size should be at least 5 million. The increment
should be more than 100. I recommend the maximum-- 32767. The maximum
increments is already 32767, which the file has exceeded by at least 10,000
increments!

CHGPF FILE(LIB/FILE) SIZE(5000000 32767 32767)

You can't change the file while it's busy-- pick a 'quiet time.'

Before you change the file, however-- How many deleted records does the

file contain? Would reorganizing the file be a good starting point?

Paul E Musselman
PaulMmn@xxxxxxxxxxxxx

--
Booth Martin
www.martinvt.com
(870)576-9371
(802)461-5349

Brain fried -- core dumped
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Regards
Evan Harris
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