> I spent some more time looking into this, and found out that actually
> the safe upper limit for btree index entries is not ~ BLCKSZ/2, but
> ~ BLCKSZ/3. btree needs to be able to insert two items on every page,
> but it *also* keeps an extra item (the "high key") on non-rightmost
> pages. So if any item exceeds one-third the available space, you run
> a risk of failure depending on what page it ends up on and what else
> is on that same page.
>
> It turns out that for an index on a single text column, the maximum
> safe text length is 2700 bytes. So the correct check for dangerous
> procedure definitions in 6.5.* is
This is another argument to try and get long tuples into 7.0.
-- Bruce Momjian | http://www.op.net/~candle maillist@candle.pha.pa.us | (610)
853-3000+ If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill,
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