Re: Minmax indexes

On Tue, Sep 17, 2013 at 4:03 PM, Alvaro Herrera
<alvherre@2ndquadrant.com> wrote:
> Thom Brown wrote:
>
> Thanks for testing.
>
>> Thanks for the patch, but I seem to have immediately hit a snag:
>>
>> pgbench=# CREATE INDEX minmaxtest ON pgbench_accounts USING minmax (aid);
>> PANIC:  invalid xlog record length 0
>
> Silly mistake I had already made in another patch.  Here's an
> incremental patch which fixes this bug.  Apply this on top of previous
> minmax-1.patch.
>
> I also renumbered the duplicate OID pointed out by Peter, and fixed the
> two compiler warnings reported by Jaime.
>
> Note you'll need to re-initdb in order to get the right catalog entries.
>

Hi,

Found another problem with the this steps:

create table t1 (i int);
create index idx_t1_i on t1 using minmax(i);
insert into t1 select generate_series(1, 2000000);
ERROR:  could not read block 1 in file "base/12645/16397_vm": read
only 0 of 8192 bytes
STATEMENT:  insert into t1 select generate_series(1, 2000000);
ERROR:  could not read block 1 in file "base/12645/16397_vm": read
only 0 of 8192 bytes

After that, i keep receiving these messages (when autovacuum tries to
vacuum this table):

ERROR:  could not truncate file "base/12645/16397_vm" to 2 blocks:
it's only 1 blocks now
CONTEXT:  automatic vacuum of table "postgres.public.t1"
ERROR:  could not truncate file "base/12645/16397_vm" to 2 blocks:
it's only 1 blocks now
CONTEXT:  automatic vacuum of table "postgres.public.t1"

--
Jaime Casanova         www.2ndQuadrant.com
Professional PostgreSQL: Soporte 24x7 y capacitación
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