Description:
This is a feature request to expose myisam_block_size as a system variable, per the following conversation:
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Date: Wed, 6 Feb 2008 22:04:48 +0100
From: Sergei Golubchik <serg@mysql.com>
To: Paul DuBois <paul@mysql.com>
Subject: Re: myisam_block_size not a system variable after all?
Hi!
On Feb 05, Paul DuBois wrote:
> At 1:11 PM +0100 2/5/08, Sergei Golubchik wrote:
> >Hi!
> >
> >On Feb 04, Paul DuBois wrote:
> >> Hi Serg,
> >>
> >> In mysqld.cc, the option structure for myisam_block_size lists it
> >> in the section where system variables are listed, and lists the name
> >> with underscores rather than dashes (further implying that it is
> >> a system variable).
> >>
> >> However, it does not appear in set_var.cc, and is not listed by
> >> SHOW VARIABLES. Is it not a system variable after all, or is it
> >> supposed to be a system variable and it is a bug that set_var.cc/SHOW
> >> VARIABLES know nothing about it?
> >
> >Yeah, I don't see why it cannot be a server variable
>
> Okay, I can file a bug report/feature request. I suppose I should
> suggest some semantics for it:
>
> - Has a GLOBAL value only (it doesn't make sense for this to have a
> SESSION value, does it?)
> - Should it be settable at runtime, or only at server startup?
Difficult to say. Maria's maria_block_size is only settable at startup,
let's do the same here.
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So the request is:
- Expose myisam_block_size as a system variable
- This variable should have only a GLOBAL value
- The value should be settable only at server startup, i.e., not dynamic.
Thank you.
How to repeat:
N/A
