Re: memcached vs tuning MySql

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Author: Keith Smith
Date:  
To: Main PLUG discussion list
Subject: Re: memcached vs tuning MySql
Ok, Thanks!!


On 2014-12-15 18:58, der.hans wrote:
> Am 12. Dez, 2014 schwätzte Keith Smith so:
>
> moin moin Keith,
>
> Your server isn't dedicated to MySQL, so don't go for max recommended.
> Determine how much active InnoDB data you'll have and allot a bit more
> than
> that or as much memory as isn't being used for other apps, whichever is
> smaller.
>
> http://www.percona.com/blog/2007/11/03/choosing-innodb_buffer_pool_size/
>
> ciao,
>
> der.hans
>
>> Hi,
>>
>> I'm working on a dual quad server with 16GB RAM. Free says it is
>> using about 10GB.
>>
>> It serves several websites, the main one is a very active Drupal
>> website. As you know Drupal is a resource hog. This one is even more
>> so since there is tons of modules adding to the mix.
>>
>> I am told I should tune MySql instead of using memcache.
>>
>> The default max_allowed_packet is 1M. Druapl requires 16M I set it
>> at 32M. I page load is much faster and this is with memcache loaded
>> and configured. Memcache is currently configured to 64M of RAM for
>> caching. Seems very small.
>>
>> Drupal uses innoDB and I am reading that increasing the
>> innodb_buffer_pool_size will lead to a bust in performance. I assume
>> this will reduce IO and the server load should go down.
>>
>> There is 4GB of free RAM and the server has not used any swap since it
>> was rebooted last night. The innodb_buffer_pool_size default value is
>> 128MB. Since I do not know what to expect I am thinking of setting it
>> to 1GB and see what happens and work up from there.
>>
>> Any feedback is much appreciated!!
>>
>> Keith
>>
>>
>
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Keith Smith
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