Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: Peter Chant Newsgroups: comp.os.linux.hardware Subject: Re: Speed ups for a disk IO bound machine Date: Mon, 12 Dec 2016 23:08:07 +0000 Lines: 28 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Trace: individual.net qkRETwG7dWWP0f4/7wryPwhcjLL5SRXvQSTn4UuGsGvqrp3dc= Cancel-Lock: sha1:faCNPIdaR9/X0RbVsVljteLAnRw= User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 In-Reply-To: Xref: csiph.com comp.os.linux.hardware:3255 On 12/12/2016 08:11 AM, David Brown wrote: > My first thought is to ask what the machine is being used for. It is > not normal to have apache/php/mariadb and firefox/browsing on the same > machine. Usually you have either a server (and therefore no desktop > processes), or a desktop (and therefore no server processes of > particular relevance). So what are you doing with the system? What is > it that is using the I/O ? Is the machine really too slow, and what do > you /feel/ is slow on it? > Home desktop / server. I have mariadb on it and the easierst way for a front end for some stuff I am doing seemed to be a lamp stack. Also have mediatomb on it and serve files to mpd on a raspberry pi. Mediatomb seems to churn the disk sometimes. Not installed right now. > My second thought is that often the best way to improve I/O performance > is to add more ram. Is that a possibility with your hardware? > I've got 8GB and about 40% acts as a disk cache. I could try hunting down 16GB on ebay but I paid full price a year or so ago for the 8GB. Looking at kinfocentre right now I have 19% of my memory free, 35% in disk cache and 44% application data. So would adding more ram do anything but add to free memory?