We are currently evaluating the merge engine. Right now we create and
preload several index caches.
But what is the best way to approach this with a merged table? Do I
create a single index cache and assign all of the shards to it?
Or do I create a separate index cache for each shard?
I
stored
into the query cache.
I did not realize this before putting a lot of work into my
stored procs. I did so partly because of the performance
benefits (I thought) of using stored procedures but I now
find that I am missing out on a major performance
enhancement -- results caching. The stored procs I
security control because its launched from the verify email
I sent him.
Now my registration sign up screen has a Captcha Security Code
Random-Noisy-Image and part of that is a string of headers to the
browser to stop caching. They look like this.
// send several headers to make sure the image
not have
session security control because it’s launched from the verify email
I sent him.
Now my registration sign up screen has a Captcha Security Code
Random-Noisy-Image and part of that is a string of headers to the
browser to stop caching. They look like this.
// send several headers to make
I guess you are saying that trying to have my php script send
the users browser html headers to stop caching is not
really going to solve my problem. I did put a block rule in
my firewall for the attackers ip address and that stopped
the attach from recurring.
But to make sure it don't happen
Filesystem buffering?
pow wrote:
Hi everyone,
Im puzzling over why a query loads faster the second time I execute it.
I am sure it is not query cached, because that is off.
I also made sure that the key that is used was already cached b4 i even
executed the query the first time. So it is not
Hello therei have seen this question before, I cannot exactly remember
when but it was a while ago. My advice is to go to the mysql.com website
and do a search thru the mailing list using a search term something like
must execute query twice or something to that effect.
-sam
Filesystem
Hi everyone,
Im puzzling over why a query loads faster the second time I execute it.
I am sure it is not query cached, because that is off.
I also made sure that the key that is used was already cached b4 i even
executed the query the first time. So it is not like as if the 2nd
execution used
Hello
I have a relatively simple table of 200+ network devices and 60+ sites.
This is accessed about 30 times a minute by various perl scripts to
pick up device/site information.
Will I see any noticable benefit from creating a cached copy of this
table as a MEMORY table? The data doesn't
In the last episode (Jun 22), Peter Hicks said:
I have a relatively simple table of 200+ network devices and 60+
sites. This is accessed about 30 times a minute by various perl
scripts to pick up device/site information.
Will I see any noticable benefit from creating a cached copy of this
MySQL 4.1.0-alpha-max-nt
MySQL C API interface
Visual C++ 6.0
trying some query when cache is on...
it causes ERROR: Lost connection to MySQL sever during query
MySQL cache memory used for _this_ query ~900Kb
but when cache is off or query result size is less than few Kb, everything is OK.
WHY?
PROTECTED]; [EMAIL PROTECTED]
Sent: Monday, October 13, 2003 12:03 AM
Subject: Re: How does LIMIT affect Query Caching
In the last episode (Oct 12), Nitin said:
query cache doesn't cache the data, but the execution plan of the
query. so, in your example it'll treat both query as same
, not the time taken to fetch the data from the database.
Enjoy
Nitin
- Original Message -
From: Reto Baumann [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Sunday, October 12, 2003 6:25 PM
Subject: How does LIMIT affect Query Caching
Does somebody know, how the LIMIT statement does affect
In the last episode (Oct 12), Nitin said:
query cache doesn't cache the data, but the execution plan of the
query. so, in your example it'll treat both query as same, as both
are fetching data from same result set. query cache just increases
the speed of query execution, that means minimizes
Hi,
I'm having some serious performance issues that are stemming from MySQL
writing data to tables. MySQL seems to cache writes, then write the
block all at once. The major issue I'm having with this is that it when
it does this it stops processing other requests until it's finished. I
have
On Monday 10 February 2003 17:54, Octavian Rasnita wrote:
Please tell me what should I do to make MySQL cache all the queries that
can be cached.
Can I do this if I am not the administrator of MySQL server? (on a session
basis...).
Take a look at query cache:
(involving mysql queries) the RAM used as cached increases quickly.
Am I wrong in thinking that there must be some relationship between
mysql queries and kernel cache memory? (maybe filesystem caching
related to index and tables files??)
I cannot find out how to prevent the kernel from caching so much
Hi all,
Please tell me what should I do to make MySQL cache all the queries that can
be cached.
Can I do this if I am not the administrator of MySQL server? (on a session
basis...).
Thanks.
Teddy,
Teddy's Center: http://teddy.fcc.ro/
Email: [EMAIL PROTECTED]
Hello all
We want a fast box which will only handle username/password queries.
I got a recommendation to look into a dedicated mysql box, setup so that it
apparently caches large amounts of the data from the database in RAM for
very fast lookups. Sounds great, but I have never done anything to
Hi.
If you are using a decent operating system and have enough memory, it
will do it for you implicitly by caching the files. This is not as
fast as it could be (because the content still has to be evaluated
each time), but already gives you the main speed advantage of memory
vs. disks.
If you
Greetings Friends,
How could cache the whole mysql database in the memory? Which parameters
would help?
Regards.
Ravi Verma
916 705 3261
-
Before posting, please check:
http://www.mysql.com/manual.php (the manual)
Nick,
Wednesday, April 10, 2002, 7:27:20 PM, you wrote:
NP I'm using Mysql 4.0.1 with query caching:
NP set-variable = query_cache_limit=10M
NP set-variable = query_cache_size=10M
NP set-variable = query_cache_startup_type=1
NP
Description:
I'm using Mysql 4.0.1 with query caching:
set-variable = query_cache_limit=10M
set-variable = query_cache_size=10M
set-variable = query_cache_startup_type=1
The Command:
mysqldump -q -K -t
: Problem with mysqldump when using query caching
Description:
I'm using Mysql 4.0.1 with query caching:
set-variable = query_cache_limit=10M
set-variable = query_cache_size=10M
set-variable = query_cache_startup_type=1
The Command:
mysqldump -q -K -t --tab='.' \
--fields-optionally
-
From: Nick Pasich [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, April 10, 2002 12:27 PM
Subject: Problem with mysqldump when using query caching
Description:
I'm using Mysql 4.0.1 with query caching:
set-variable = query_cache_limit=10M
set-variable = query_cache_size
I'm curious about what guarantees MySQL (and the SQL standard) provide with
regard to multiple calls to NOW() within the same statement. If the
statement takes a long time to execute, will NOW() be consistent across all
invocations?
The trivial example of this is if you're updating a large set of
I'd also love any suggestions/criticisms of the above architecture. I'm
trying to address what is a potentially significant performance issue for
us
(we hope to allow the main table to grow to tens to hundreds of millions
of
rows before pruning it down), but there might be a much simpler
Hello Chetan,
CL hi,
CL I wanted to set variable query_cache_size..
CL I have tried for this as in below but the machine hangs up every time i
CL am doing this...
CL Any other method by which I can set this Variable..?
Try to run safe_mysqld in background mode.
CL shell mysqld -u root
In the last episode (Jan 21), Jeremy Zawodny said:
On Tue, Jan 22, 2002 at 12:57:12PM +0530, Chetan Lavti wrote:
Is there any other way (except query cache) using which the database
can be made memory resident. Actually I want a database which is to
be used by a lookup server(something
On Tue, Jan 22, 2002 at 12:57:12PM +0530, Chetan Lavti wrote:
Is there any other way (except query cache) using which the database
can be made memory resident. Actually I want a database which is to
be used by a lookup server(something like a dns server). The
database lookup delay can
Lavti
Cc: [EMAIL PROTECTED]
Subject: Re: regarding the MySQL's server Caching feature
On Tue, Jan 22, 2002 at 12:57:12PM +0530, Chetan Lavti wrote:
Is there any other way (except query cache) using which the database
can be made memory resident. Actually I want a database which is to
be used
On Tue, Jan 22, 2002 at 01:07:09PM +0530, Chetan Lavti wrote:
thanks again ,
yes, I have seen that but isn't it MySQL's default feature.. I will
explore it more and talk to you for further queries..
Hmm. Not sure what you mean. Every version of MySQL released in the
last couple years has
Hello,
Coming from an ASP world, I'm trying to learn how to break the browser from
caching. I am using variables and their values in the querystring to update
a mysql database with perl. I am also re-querying the database to pull back
the record. I was hoping to pull back the updated record
On Thursday 13 Dec 2001 03:42, Jack A. Fobel wrote:
Hello,
Coming from an ASP world, I'm trying to learn how to break the browser from
caching. I am using variables and their values in the querystring to
update a mysql database with perl. I am also re-querying the database to
pull back
Hi there,
Does anybody know where to find documentation about MySQL caching?
Thanks.
Xiaofeng Wang
-
Before posting, please check:
http://www.mysql.com/manual.php (the manual)
http://lists.mysql.com
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: Caching Bug with AUTO_INCREMENT columns
Description:
When i use a table with an AUTO_INCREMENT column and
insert Data in the Table with a NULL Value for the
AUTO_INCREMENT column, AUTO_INCREMENT sets an new value
parameter ?
*slightly blank look*
P
On Tue, 13 Feb 2001
[EMAIL PROTECTED] wrote:
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: Caching Bug with AUTO_INCREMENT columns
Description:
When i use a table with an AUTO_INCREMENT column and
insert Data in the Table
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