From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adam Goryachev Subject: stripe_cache_active always 0 Date: Thu, 7 Jan 2016 14:09:26 +1100 Message-ID: <568DD6E6.6070107@websitemanagers.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids I remember some years ago when I was building my storage servers I spent a lot of time optimising performance, and eventually got some really good stats and more importantly, good enough performance that users stopped complaining, and things "just work". However, when comparing config with another server, I noticed one of the values I configured was stripe_cache_size, and I was setting this to 4096 (which was the peak performance compared to higher/lower numbers at the time). In any case, I'm looking at a "in use" system, and looking at stripe_cache_active and it is always 0. I'm trying to find some docs on what this value means? Is the stripe cache disabled? Are there just no stripes in the cache? If it is always 0, then does it mean I don't need to adjust the stripe_cache_size (I presume worst case is I am wasting RAM which is not really important anyway). Thanks, Adam -- Adam Goryachev Website Managers P: +61 2 8304 0000 adam@websitemanagers.com.au F: +61 2 8304 0001 www.websitemanagers.com.au