Hi
dspam=# ALTER TABLE dspam_token_data SET ( FILLFACTOR = 90 );
ALTER TABLE
dspam=# CLUSTER dspam_token_data USING dspam_token_data_uid_key;
ERROR: index "dspam_token_data_uid_key" for table "dspam_token_data"
does not exist
dspam=# \d dspam_token_data
Table "public.dspam_token_data"
Column | Type | Modifiers
---------------+---------+-----------
uid | integer |
token | bigint |
spam_hits | integer |
innocent_hits | integer |
last_hit | date |
Indexes:
"dspam_token_data_uid_token_key" UNIQUE, btree (uid, token)
dspam=# CLUSTER dspam_token_data USING dspam_token_data_uid_token_key;
CLUSTER
dspam=#
I think CLUSTER dspam_token_data;
enough for the further clustering?
How often should I run CLUSTER?
Thanks
On Tue, Mar 29, 2011 at 9:29 PM, Kenneth Marshall <k...@rice.edu> wrote:
> On Tue, Mar 29, 2011 at 08:27:25PM +0300, Ibrahim Harrani wrote:
>>
>> > How did you change the fillfactor? You would need to do an alter
>> > table followed by a cluster to rewrite the table and include the
>> > freespace required by the fillfactor. Is that how you performed
>> > that operation. You could also do a full copy to a new table with
>> > the correct fillfactor.
>>
>> I simply issued
>> ALTER TABLE dspam_token_data SET ( FILLFACTOR = 90 );
>> But I did not make a fully copy on the table.
>> Can you give me an example how to issue cluster on the table?
>>
>
> CLUSTER dspam_token_data USING dspam_token_data_uid_key;
>
> This command will rewrite the table with the correct fill-factor
> and allow HOT updates to work.
>
> Cheers,
> Ken
>
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