> -----Original Message----- > From: Tony Mountifield <tony at softins.co.uk> > Sent: Tuesday, August 06, 2019 5:44 AM > To: centos at centos.org > Subject: Re: [CentOS] browsers slowing Centos 7 installation to a crawl > > In article <alpine.DEB.2.20.1908051718240.19025 at mail.cs.ndsu.nodak.edu>, > Michael Hennebry <hennebry at web.cs.ndsu.nodak.edu> wrote: > > > > I'll need to do some digging to discover whether my box needs DDR2 or > DDR3.DDR3 > > I doubt it's DDR4. > > Do: > > # dmidecode | less > > and look for the entries for the existing RAM you have. It will also tell > you if you have any unpopulated RAM slots ("No module installed"). > <SNIP> In the mean time you could enable zswap[1] to make the most out of the ram and swap you do have. according to [2] either add 'zswap.enabled=1' to the boot line or 'echo 1 > /sys/module/zswap/parameters/enabled' On an EL6 system with 512M of ram (yes that is correct, .5GB, actually ~.4GB because some is shared with the intel video) I use up-to-date EL6 firefox reasonably comfortably at home using zswap, setting max_pool_percent to 40. I am trying to remember which kernel 7 is running (I tend to use the elrepo LT kernel on EL6) and if it has zswap or only zram. before switching to the LT kernel I used zram [3] on the machine as swap space (pretending to be 90% of ram) instead and it works very fast, but when it runs out (say on a site with lots of JPGs) and you hit real swap again performance tanks VERY badly. EL7 may have zram setup to swap in such a way that you can 'sysctl start zram' and try it out. Good luck. [1] https://en.wikipedia.org/wiki/Zswap [2] https://www.kernel.org/doc/html/latest/vm/zswap.html [3] https://en.wikipedia.org/wiki/Zram -- Even when this disclaimer is not here: I am not a contracting officer. I do not have authority to make or modify the terms of any contract.