partitioning will help u
Krishna
On Fri, Jan 14, 2011 at 4:18 AM, Sairam Krishnamurthy
kmsram...@gmail.comwrote:
All,
I have a very large table. It has about 1 billion rows. Initially
everything was fine. But now the table is a bit slow. Loaded takes a lot of
time. I usually load in chunks
How would you rewrite the following SQL so that is doesn't do a full
table scan. It does in fact do a full scan in spite of the time
clause. It's been
making me nuts for months.
select count(*) as count
from alerts where (unix_timestamp(stamp) (unix_timestamp(now()) -
'300' ) )
and devid =
The problem is that you're using a function on your indexed field, which
prevents the index from being used (I'm assuming you have an index on
stamp).
Store stamp directly as unixtime (use a time field) or if that's not an
option, add a column that does - if you want you can autofill it with a
Hello,
While doing a select query I got the following error in the error-log file:
Incorrect key feil for table '/tmp/#sql_5f8_0.MYI'; try to repair it
It seem rather meaningless to try to repair a temporary table... So is this a
bug in MySQL, or?
The database I'm using has only InnoDb
can you send DDL of the table?
On Fri, Jan 14, 2011 at 4:22 PM, Bruce Ferrell bferr...@baywinds.orgwrote:
How would you rewrite the following SQL so that is doesn't do a full
table scan. It does in fact do a full scan in spite of the time
clause. It's been
making me nuts for months.
Hey,
Try making `id` as primary key. That will keep data in sorted manner and
scan will look only the data required in-spite of full table scan.
On Fri, Jan 14, 2011 at 4:22 PM, Bruce Ferrell bferr...@baywinds.orgwrote:
How would you rewrite the following SQL so that is doesn't do a full
On 1/14/2011 4:52 AM, Bruce Ferrell wrote:
How would you rewrite the following SQL so that is doesn't do a full
table scan. It does in fact do a full scan in spite of the time
clause. It's been
making me nuts for months.
select count(*) as count
from alerts where (unix_timestamp(stamp)
Check your free diskspace on your temp location.
On Fri, Jan 14, 2011 at 1:31 PM, Jørn Dahl-Stamnes
sq...@dahl-stamnes.netwrote:
Hello,
While doing a select query I got the following error in the error-log
file:
Incorrect key feil for table '/tmp/#sql_5f8_0.MYI'; try to repair it
It
On 1/14/11 3:52 AM, Bruce Ferrell wrote:
select count(*) as count
from alerts where (unix_timestamp(stamp) (unix_timestamp(now()) -
'300' ) )
and devid = '244';
Bruce -
The problem is that the index is useless, because you're running a
function on the timestamp. What you want is this:
-Original Message-
From: Jørn Dahl-Stamnes [mailto:sq...@dahl-stamnes.net]
Sent: Friday, January 14, 2011 7:31 AM
To: mysql@lists.mysql.com
Subject: Incorrect key file for table
Hello,
While doing a select query I got the following error in the error-log file:
Incorrect key feil
-Original Message-
From: Bruce Ferrell [mailto:bferr...@baywinds.org]
Sent: Friday, January 14, 2011 5:53 AM
To: mysql@lists.mysql.com
Subject: Rewrite SQL to stop table scan
How would you rewrite the following SQL so that is doesn't do a full
table scan. It does in fact do a full scan
I wondered if you can get me started on selling MANY mailing list to
potential clients who are in need of millions of e-mail names and addresses.
This has collected for some time. I am needing to start a business doing this
Here in the United States and out of country yet I am not sure how
Yogesh,
The type is MyISAM. So i guess size is not a matter for now. I am well
over the limit for MyISAM. I will partition the table and check.
Thanks,
Sairam Krishnamurthy
+1 612 859 8161
On 01/14/2011 01:27 AM, Yogesh Kore wrote:
What is the table type for Table?
Firstly check with
On Friday 14 January 2011 14:03, Johan De Meersman wrote:
Check your free diskspace on your temp location.
About 900+ Mb free.
But I don't think that a full filesystem was the problem (I don't think the
mysqld server was able to fill the disk with 900 Mb in 1-2 seconds). After
some debugging
The result of your query without the join
probably exceeded your tmp_table_size variable. When this
occurs, MySQL quit writing the temp table to disk thus producing an
incorrect table file. (I think).
JW
On Fri, Jan 14, 2011 at 3:48 PM, Jørn Dahl-Stamnes
sq...@dahl-stamnes.netwrote:
On Friday
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
What's the output of mysql_config --libs for you?
On 11-01-08 00:06, Delan Azabani wrote:
Hi all,
This is a novice problem I'm having with compiling a C CGI program with
MySQL on my Gentoo box.
I have a simple source so far:
*
On 01/14/2011 08:19 AM, Steve Meyers wrote:
On 1/14/11 3:52 AM, Bruce Ferrell wrote:
select count(*) as count
from alerts where (unix_timestamp(stamp) (unix_timestamp(now()) -
'300' ) )
and devid = '244';
Bruce -
The problem is that the index is useless, because you're running a
Hello
At one time I had (or at least partially) installed mysql on my
laptop. I went to install a new version and I am getting the following error:
A windows service with the name MySql already exists. Please
uninstall this service correctly or choose a different name for the
new service.
On Saturday 15 January 2011 00:28, Johnny Withers wrote:
The result of your query without the join
probably exceeded your tmp_table_size variable. When this
occurs, MySQL quit writing the temp table to disk thus producing an
incorrect table file. (I think).
Yes, part of this was my fault (the
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