Hi everybody,
shared_buffer maximum limit is ?
I set shared_buffer more than 250G, I got error at startup pg.
This error usually means that PostgreSQL's request for a shared memory
segment exceeded your kernel's SHMMAX parame
Hi everybody,
An SQL execution is very slow.
What can I do to makes it faster。
count_MCL
3476534
count_MLC
34442313
count_HLCC
-
245119339
Hi everyone
■SQL-1
CREATE TABLE wk_mclid1(
id1 integer ,
PRIMARY KEY(id1)
);
■SQL-2
INSERT INTO wk_mclid1(id1)
VALUES(1),(2),(3),(4),(5),(6),(7),(8),(9),(10)
GO
■SQL-3
select * from wk_mclid1 where id1= (round((random() * (10-1))::integer)
+ 1)::integer;
When we excute SQL-3,sometimes the res
Thanks Tom, I try it.
于 2012-7-25 10:55, Tom Lane 写道:
> wangqi writes:
>> ■SQL-3
>> select * from wk_mclid1 where id1= (round((random() * (10-1))::integer)
>> + 1)::integer;
>> When we excute SQL-3,sometimes the result was 0 record or more than 1
>> record.
&
Hi Tom
If you don't want that, you can use a WITH to lock down the result of a
single random() call.
How should I do it?
于 2012-7-25 10:55, Tom Lane 写道:
> wangqi writes:
>> ■SQL-3
>> select * from wk_mclid1 where id1= (round((random() * (10-1))::integer)
>> + 1)::
Hi everybody
What's this in command 'ps ux'. If these processes appears The Server
load average: 100.99, 100.74, 86.85.
How can I reslove it.
-
postgres 35044 34.2 0.0 0 0 ? Rs 00:19 50:42 [postmaster]
post
