<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    <br>
    <br>
    <div class="moz-cite-prefix">On 10/12/18 1:24 PM, Fred Gleason
      wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:3B9DE6C0-3886-4B9D-9838-C4103FB5FBD9@paravelsystems.com">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      On Oct 12, 2018, at 13:15, Gordan Bobic <<a
        href="mailto:gordan@redsleeve.org" class=""
        moz-do-not-send="true">gordan@redsleeve.org</a>> wrote:
      <div class=""><br class="">
        <div>
          <blockquote type="cite" class="">
            <div class=""><span style="font-family: Helvetica;
                font-size: 12px; font-style: normal; font-variant-caps:
                normal; font-weight: normal; letter-spacing: normal;
                orphans: auto; text-align: start; text-indent: 0px;
                text-transform: none; white-space: normal; widows: auto;
                word-spacing: 0px; -webkit-text-stroke-width: 0px;
                float: none; display: inline !important;" class="">It
                depends on what you are running on that system. If you
                have 1GB of RAM and want to run a desktop environment
                web browser, that'll go pretty poorly without swap.</span></div>
          </blockquote>
        </div>
        <br class="">
      </div>
      <div class="">So how does putting swap on RAM help that situation?
        You’re not increasing the overall memory space by doing so, but
        merely partitioning it into two different buckets (while also
        adding the complexity and performance overhead of accessing the
        part that is now ‘swap’).</div>
    </blockquote>
    <br>
    See Gordon's earlier comment on Firefox's bad memory allocation. 
    Zram is a big help there; I see this on my F29 system.<br>
    <br>
    <tt># free</tt><tt><br>
    </tt><tt>              total        used        free      shared 
      buff/cache   available</tt><tt><br>
    </tt><tt>Mem:        1022148      655520      107204      
      22284      259424      327636</tt><tt><br>
    </tt><tt>Swap:        487304      253952      233352</tt><tt><br>
    </tt><tt><br>
    </tt><tt># zramctl </tt><tt><br>
    </tt><tt>NAME       ALGORITHM DISKSIZE   DATA  COMPR  TOTAL STREAMS
      MOUNTPOINT</tt><tt><br>
    </tt><tt>/dev/zram0 lz4         475.9M 246.4M 109.1M 114.2M       2
      [SWAP]</tt><tt><br>
    </tt>  <br>
    My mail server can be all over the place on memory and swap usage
    (it uses real swap file on sata) depending on what all the scanning
    software is doing and who is using roundcubemail.<br>
    <br>
    So YMMV, and this should not hurt if your system does not need to
    swap.<br>
    <br>
    <tt># free</tt><tt><br>
    </tt><tt>              total        used        free      shared 
      buff/cache   available</tt><tt><br>
    </tt><tt>Mem:        2060396      189332     1189972      
      26432      681092     1766392</tt><tt><br>
    </tt><tt>Swap:        982420           0      982420</tt><tt><br>
    </tt><tt><br>
    </tt><tt># zramctl </tt><tt><br>
    </tt><tt>NAME       ALGORITHM DISKSIZE DATA COMPR TOTAL STREAMS
      MOUNTPOINT</tt><tt><br>
    </tt><tt>/dev/zram0 lz4         959.4M   4K   64B    4K       2
      <swap></tt><tt><br>
    </tt><br>
    <br>
    I may switch this setup to a Cubeboard2 (1GB mem) from the
    Cubietruck.   I have a number of C2 and only a couple CT, so if it
    does not need the memory...<br>
    <br>
    <blockquote type="cite"
      cite="mid:3B9DE6C0-3886-4B9D-9838-C4103FB5FBD9@paravelsystems.com">
      <div class=""><br class="">
      </div>
      <div class="">Cheers!</div>
      <div class=""><br class="">
      </div>
      <div class=""><br class="">
      </div>
      <div class="">
        <div style="margin: 0px; font-size: 11px; line-height: normal;
          font-family: Menlo;" class=""><span
            style="font-variant-ligatures: no-common-ligatures" class="">|----------------------------------------------------------------------|</span></div>
        <div style="margin: 0px; font-size: 11px; line-height: normal;
          font-family: Menlo;" class=""><span
            style="font-variant-ligatures: no-common-ligatures" class="">|
            Frederick F. Gleason, Jr. |              Chief Developer    
                    |</span></div>
        <div style="margin: 0px; font-size: 11px; line-height: normal;
          font-family: Menlo;" class=""><span
            style="font-variant-ligatures: no-common-ligatures" class="">|
                                      |              Paravel Systems    
                    |</span></div>
        <div style="margin: 0px; font-size: 11px; line-height: normal;
          font-family: Menlo;" class=""><span
            style="font-variant-ligatures: no-common-ligatures" class="">|----------------------------------------------------------------------|</span></div>
        <div style="margin: 0px; font-size: 11px; line-height: normal;
          font-family: Menlo;" class=""><span
            style="font-variant-ligatures: no-common-ligatures" class="">| 
                    A room without books is like a body without a soul.
                    |</span></div>
        <div style="margin: 0px; font-size: 11px; line-height: normal;
          font-family: Menlo;" class=""><span
            style="font-variant-ligatures: no-common-ligatures" class="">|
                                                    -- Cicero           
                    |</span></div>
        <div style="margin: 0px; font-size: 11px; line-height: normal;
          font-family: Menlo;" class=""><span
            style="font-variant-ligatures: no-common-ligatures" class="">|----------------------------------------------------------------------|</span></div>
      </div>
      <div class=""><span style="font-variant-ligatures:
          no-common-ligatures" class=""><br class="">
        </span></div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <pre class="moz-quote-pre" wrap="">_______________________________________________
Arm-dev mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Arm-dev@centos.org">Arm-dev@centos.org</a>
<a class="moz-txt-link-freetext" href="https://lists.centos.org/mailman/listinfo/arm-dev">https://lists.centos.org/mailman/listinfo/arm-dev</a>
</pre>
    </blockquote>
    <br>
  </body>
</html>