Re: Curious about dead rows.

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Andrew Sullivan wrote:
> Please don't drop the list, as someone else may see something.
>
> On Tue, Nov 13, 2007 at 10:06:13AM -0500, Jean-David Beyer wrote:
>> OK. I turned logging from "none" to "mod" and got a gawdawful lot of stuff.
>
> Yes.
>
>> Then I ran it and got all the inserts. Using
>> grep -i delete file
>> grep -i update file
>> grep -i rollback file
>
> How about ERROR?

$ grep -i error Tue.log
$
>
>> 2007-11-13 08:11:20 EST DEBUG: "vl_ranks": scanned 540 of 540 pages,
>> containing 67945 live rows and 554 dead rows; 3000 rows in sample, 67945
>> estimated total rows
>
> If there are dead rows, something is producing them. Either INSERT is
> firing a trigger that is doing something there (you won't see an UPDATE in
> that case), or else something else is causing INSERTs to fail.

I have no triggers in that database. I do have two sequences.

List of relations
Schema | Name | Type | Owner
- --------+------------------------+----------+---------
public | company_company_id_seq | sequence | jdbeyer
public | source_source_id_seq | sequence | jdbeyer

stock=> \d company_company_id_seq
Sequence "public.company_company_id_seq"
Column | Type
- ---------------+---------
sequence_name | name
last_value | bigint
increment_by | bigint
max_value | bigint
min_value | bigint
cache_value | bigint
log_cnt | bigint
is_cycled | boolean
is_called | boolean

stock=> \d source_source_id_seq
Sequence "public.source_source_id_seq"
Column | Type
- ---------------+---------
sequence_name | name
last_value | bigint
increment_by | bigint
max_value | bigint
min_value | bigint
cache_value | bigint
log_cnt | bigint
is_cycled | boolean
is_called | boolean

but they are not used after the last VACUUM FULL ANALYZE

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