Re: feeding big script to psql - Mailing list pgsql-general

At 1:57 PM +0200 8/2/05, Havasvölgyi Ottó wrote:
>Hi,
>
>Now I am at 7 MB, and the reading speed is 3-4KB/sec.

Have you checked to see if you're swapping as
this goes on, either in the client or on the
server?

>----- Original Message ----- From: "Havasvölgyi Ottó" <h.otto@freemail.hu>
>To: <pgsql-general@postgresql.org>
>Sent: Tuesday, August 02, 2005 1:31 PM
>Subject: Re: [GENERAL] feeding big script to psql
>
>>Hi,
>>
>>The effect is the same even if I redirect the
>>output to file with the -o switch.
>>At the beginning 200 KB/sec, at 1.5 MB the speed is less than 20 KB/sec.
>>
>>Best Regards,
>>Otto
>>
>>
>>
>>----- Original Message ----- From: "Havasvölgyi Ottó" <h.otto@freemail.hu>
>>To: "Tom Lane" <tgl@sss.pgh.pa.us>
>>Cc: <pgsql-general@postgresql.org>
>>Sent: Tuesday, August 02, 2005 11:24 AM
>>Subject: Re: [GENERAL] feeding big script to psql
>>
>>>Tom,
>>>
>>>Thanks for the suggestion. I have just applied
>>>both switch , -f (I have applied this in the
>>>previous case too) and -n, but it becomes slow
>>>again. At the beginning it reads about 300 KB
>>>a second, and when it has read 1.5 MB, it
>>>reads only about 10 KB a second, it slows down
>>>gradually. Maybe others should also try this
>>>scenario. Can I help anything?
>>>
>>>Best Regards,
>>>Otto
>>>
>>>
>>>----- Original Message ----- From: "Tom Lane" <tgl@sss.pgh.pa.us>
>>>To: "Havasvölgyi Ottó" <h.otto@freemail.hu>
>>>Cc: <pgsql-general@postgresql.org>
>>>Sent: Tuesday, August 02, 2005 3:54 AM
>>>Subject: Re: [GENERAL] feeding big script to psql
>>>
>>>>=?ISO-8859-1?Q?Havasv=F6lgyi_Ott=F3?= <h.otto@freemail.hu> writes:
>>>>>I know it would be faster with COPY, but this is extremly slow, and the
>>>>>bottleneck is psql.
>>>>>What is the problem?
>>>>
>>>>Hmm, does the Windows port have readline support, and if so does adding
>>>>the "-n" switch to the psql invocation fix the problem?  Or you could
>>>>try feeding the script with -f switch or \i rather than "psql <script".
>>>>Readline adds a fair amount of overhead, which is completely invisible
>>>>at human typing speeds but can be annoying when reading scripts.
>>>>
>>>>regards, tom lane
>>>>
>>>
>>>
>>>
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>>
>>
>>
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--
                Dan

--------------------------------------it's like this-------------------
Dan Sugalski                          even samurai
dan@sidhe.org                         have teddy bears and even
                                       teddy bears get drunk