At 18:22 +0100 1/10/03, Blaster wrote:
>Happy as I was, I pulled out a test box, installed Linux Debian on
>it, downloaded MySQL 4 on it, everything worked smooth, now I wanted
>to enable
>the cache feature, but it didn't let me! I want the change to be
>permanent, so I looked up the doc pages at mysql.com, and found info
>about the
>/etc/my.cnf file, which I created and put in:
>
>[mysqld]
>set-variable = query_cache_size = 67108864
>
>The MySQL deamon was restarted, but when I checked the run-time
>variables with SHOW STATUS, query_cache_size was still set to 0? I
>even tried
That's odd, since it's SHOW VARIABLES that displays query_cache_size.
SHOW STATUS displays the Qcache_% variables. But anyway, the syntax
looks okay; I use a similar line on my laptop:
set-variable = query_cache_size=1M
(1M = 1 megabyte)
>rebooting the entire machine after the changes to my.cnf, but it
>wouldn't work -- as if MySQL ignored my file? Now, I was thinking,
>either MySQL
>reads the setting from somewhere else in my system, but since I
>cannot find a "config file" variable in SHOW STATUS, I cannot find
>out from where?
>Another possibility is that it does read it, but for some reason
>ignores it, or even worse, reads a 2nd config file and the setting
>is overriden?
Possibly. mysqld --help will show you the option files that it reads,
and mysqld --print-defaults will show you the option settings that it's
picking up from option files.
>
>Now, this was quite odd I thought, so I tried to set the cache
>manually with a query,
>
>"SET GLOBAL query_cache_size=67108864"
>
>and that worked like a charm, it even updated "query_cache_type" to
>1, which, according to the manuals mean ON.
>
>Now, I was wondering if any of you have a hint on what might be wrong?
>
>Also, as a little sidenote, I'm kinda wondering, what is a _decent_
>size for the Cache buffer? is 64 Mb enough? I'm getting an upgraded
>server aswell, it
>will be 800 Mhz and have 256 MB of ram, this box will be 100% MySQL
>and I'll leave the Webserver on the old 400 Mhz. Any other hints on
>general
>optimizing is appreciated!
I only use 1MB, but I don't have a lot of repeated huge queries.
>
>Sorry if this post got too long, this is my first time posting on
>this list. Take it easy on my poor english skills =)
