<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
        {font-family:Helvetica;
        panose-1:2 11 6 4 2 2 2 2 2 4;}
@font-face
        {font-family:"MS Mincho";
        panose-1:2 2 6 9 4 2 5 8 3 4;}
@font-face
        {font-family:"Cambria Math";
        panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
        {font-family:Calibri;
        panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
        {font-family:Tahoma;
        panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
        {font-family:"Edwardian Script ITC";
        panose-1:3 3 3 2 4 7 7 13 8 4;}
@font-face
        {font-family:"\@MS Mincho";
        panose-1:2 2 6 9 4 2 5 8 3 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
        {margin:0in;
        margin-bottom:.0001pt;
        font-size:11.0pt;
        font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
        {mso-style-priority:99;
        color:#0563C1;
        text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
        {mso-style-priority:99;
        color:#954F72;
        text-decoration:underline;}
span.EmailStyle17
        {mso-style-type:personal-compose;
        font-family:"Calibri",sans-serif;
        color:windowtext;}
.MsoChpDefault
        {mso-style-type:export-only;
        font-family:"Calibri",sans-serif;}
@page WordSection1
        {size:8.5in 11.0in;
        margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
        {page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="EN-US" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<p class="MsoNormal">Hey folks,<o:p></o:p></p>
<p class="MsoNormal"><o:p>&nbsp;</o:p></p>
<p class="MsoNormal">Is anyone seeing acceptable load balance scaling with pgpool-II, particularly with JDBC clients?&nbsp; With one to four replicas, we are not seeing any throughput performance enhancements at all.&nbsp; Through Google, I did find this article:<o:p></o:p></p>
<p class="MsoNormal"><o:p>&nbsp;</o:p></p>
<p class="MsoNormal"><a href="http://www.enterprisedb.com/postgres-plus-edb-blog/jason-davis/pgpool-ii-enables-horizontal-scalability-postgres">http://www.enterprisedb.com/postgres-plus-edb-blog/jason-davis/pgpool-ii-enables-horizontal-scalability-postgres</a><o:p></o:p></p>
<p class="MsoNormal"><o:p>&nbsp;</o:p></p>
<p class="MsoNormal">The results that we are seeing are similar to the reported 100 client and 300 client models that EDB tested.&nbsp; We are not seeing the pop that EDB&#8217;s 1000 client model shows.&nbsp; Also, what load balancing tuning options are suggested?&nbsp; The article
 mentions adjusting the primary data server backend_weight.&nbsp; We haven&#8217;t tried this yet, but I&#8217;m presuming that this will help with the read query throughput.<o:p></o:p></p>
<p class="MsoNormal"><o:p>&nbsp;</o:p></p>
<p class="MsoNormal"><o:p>&nbsp;</o:p></p>
<p class="MsoNormal"><span style="font-size:22.0pt;font-family:&quot;Edwardian Script ITC&quot;,serif">Ken Young</span><span style="font-family:&quot;Edwardian Script ITC&quot;,serif"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">Ken.Young@sas.com</span></b><span style="font-size:12.0pt;font-family:&quot;Times New Roman&quot;,serif">
<br>
</span><b><span style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">Data Management R&amp;D</span></b><span style="font-size:12.0pt;font-family:&quot;Times New Roman&quot;,serif">
<br>
</span><b><span style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">SAS Institute, Inc.</span></b><span style="font-size:12.0pt;font-family:&quot;Times New Roman&quot;,serif">
<br>
</span><b><span style="font-size:10.0pt;font-family:&quot;Tahoma&quot;,sans-serif">919-531-9319
</span></b><span style="font-size:12.0pt;font-family:&quot;Times New Roman&quot;,serif"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif"><a href="http://www.sas.com/"><span style="color:blue">http://www.sas.com</span></a></span><span style="font-size:12.0pt;font-family:&quot;Times New Roman&quot;,serif">
<o:p></o:p></span></p>
<p class="MsoNormal"><b><i><span style="font-size:13.5pt;font-family:&quot;Helvetica&quot;,sans-serif">SAS...</span>&nbsp; The Power to Know</i></b>
<o:p></o:p></p>
<p class="MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
</html>