Comments on: Enable the query cache in MySQL to improve performance

By: V

Fri, 27 Jan 2012 09:43:55 +0000

How one can determine the need to increase or decrease the query_cache_limit size?

By: khupcom

khupcom — Mon, 05 Sep 2011 01:05:57 +0000

[mysqld_safe]
query_cache_type=1
query_cache_size = 64M
query_cache_limit= 64M

Not working with mysql 5.5

By: Rob Chant

Rob Chant — Thu, 18 Aug 2011 15:08:56 +0000

It uses a least recently used system for pruning the cache, so there’s no explicit timeout for cached queries.

By: Milos Popovic

Milos Popovic — Tue, 01 Mar 2011 12:25:26 +0000

Tnx very much, it’s works :D

By: Deepak Agrawal

Deepak Agrawal — Mon, 03 Jan 2011 00:27:33 +0000

hey thx a lot very much for this information you have my a lot of time and money thx if you have any other information important in my sql plz inform me

By: Purab Kharat

Purab Kharat — Mon, 18 Oct 2010 07:22:01 +0000

I am having one doubt..When this mysql query cache will be destroyed. Is there any setting available for destroying the cache time.

By: 111110100

111110100 — Thu, 17 Dec 2009 08:42:36 +0000

You can also explicitly set to my.cnf

query_cache_size=256M
query_cache_type=1
query_cache_limit=1M

By: Mr.Urs

Mr.Urs — Thu, 19 Feb 2009 05:37:18 +0000

Good information

By: rapidshare library

rapidshare library — Thu, 22 Jan 2009 11:26:34 +0000

here

size are in bytes not in KB
mysql> SET GLOBAL query_cache_size = 16777216;

16777216 Bytes

By: Nathan

Nathan — Wed, 15 Oct 2008 20:45:35 +0000

I did some benchmarking with and without this setting enabled and noticed virtually no difference, I performed the exact same SELECT query about 900.000 times and marked the microseconds it took.. so in theory the cache should jump in right away..

By: mmorpg

mmorpg — Sat, 27 Sep 2008 02:33:54 +0000

Thanks, that is always a big concern with multiple databases. Good tips for the MySQL

By: dog

dog — Fri, 11 Jul 2008 01:49:41 +0000

You might be using skype. Skype is configured to use port 80 and 443 when it can’t use another port for incoming connections. Check your advanced options to turn this off, and Apache will run properly.

By: Me

Me — Sat, 05 Apr 2008 13:04:29 +0000

In one sentence you show a 16MB cache size as 16777216. In another, you explain that the variable values (ie, 16777216) are in KB. You should correct this, as it might confuse folks who don’t know which it is (that is, if you express it as 16777216 it is NOT in KB, it’s in bytes).

By: Siddique

Siddique — Mon, 21 Jan 2008 05:21:58 +0000

Hi, Nice good information

By: Shelon Padmore

Shelon Padmore — Thu, 17 Jan 2008 14:06:24 +0000

Yes a reboot may help. Also try configuring httpd to listen on another port, just to see if all is well with the httpd installation.

Shelon Padmore

By: nixcraft

nixcraft — Wed, 07 Feb 2007 15:18:13 +0000

Restart Linux system. Also note that you must run netstat command as root user. BTW what Linux distro you are using?

By: vijay prakash

vijay prakash — Wed, 07 Feb 2007 13:13:49 +0000

Sir,

I have already used above commands but still the problem persist. When i use netstat then no pid/program name displays as i have already mentioned the output i am getting in earlier query. Please help me in this situation what should i do.

thankyou.

vijay

By: nixcraft

nixcraft — Wed, 07 Feb 2007 12:47:35 +0000

Stop Apache webserver using
/etc/init.d/httpd stop
OR
killall -9 httpd
Also you need to run netstat -tulpn | grep :80 as root user so you will get program name or PID

By: vijay prakash

vijay prakash — Wed, 07 Feb 2007 06:53:47 +0000

Sir,
I wanted to run a website on port 80 through apache webserver but it is showing that port is already in use. When i try to find out which application is running on port 80 by this command

netstat -tulpn | grep :80

it is showing following result

tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN -

Please help me how can i kill this so that port 80 can be utilised for apache web server.
Thankyou

Vijay