<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif"><br clear="all"></div><div><div class="gmail_default" style="font-family:verdana,sans-serif">​Hi all​,</div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif">I need some suggestion from all of you about how to tweak & tuning the openstack performance in HA.</div><div class="gmail_default" style="font-family:verdana,sans-serif"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif">Because my Horizon is often encountered "cannot retrieve instance list" while accessing "Projects  > Compute > Instances" menu in Horizon</div><div class="gmail_default" style="font-family:verdana,sans-serif"> </div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><font size="2"><span style="font-family:"trebuchet ms",sans-serif">Cheers,</span><br style="font-family:"trebuchet ms",sans-serif"><br></font><table border="0" cellpadding="0" cellspacing="0" style="margin:0px;padding:0px;border:0px;outline:0px;font-size:14px;font-family:proxima-nova-1,proxima-nova-2,Tahoma,Helvetica,Verdana,sans-serif;vertical-align:baseline;color:rgb(51,51,51);line-height:18.2px"><tbody style="margin:0px;padding:0px;border:0px;outline:0px;font-weight:inherit;font-style:inherit;font-family:inherit;vertical-align:baseline"><tr style="margin:0px;padding:0px;border:0px;outline:0px;font-weight:inherit;font-style:inherit;font-family:inherit;vertical-align:baseline"><td style="padding:0px;border:0px;outline:0px;font-style:inherit;font-size:0px;font-family:inherit;vertical-align:baseline;width:auto;height:30px"> </td></tr><tr style="margin:0px;padding:0px;border:0px;outline:0px;font-weight:inherit;font-style:inherit;font-family:inherit;vertical-align:baseline"><td style="padding:0px;border:0px;outline:0px;font-style:inherit;font-family:inherit;vertical-align:baseline;width:auto"><div style="margin:0px;padding:0px;border:0px;outline:0px;font-weight:inherit;font-style:inherit;font-family:inherit;vertical-align:baseline;line-height:0"><a href="http://about.me/a_dhi?promo=email_sig" style="margin:0px;padding:0px;border:0px;outline:0px;font-weight:inherit;font-style:inherit;font-family:inherit;vertical-align:baseline;color:rgb(58,169,233);text-decoration:none;display:inline-block" target="_blank"><table border="0" cellpadding="0" cellspacing="0" style="margin:0px;padding:0px;border:0px;outline:0px;font-weight:inherit;font-style:inherit;font-family:inherit;vertical-align:baseline"><tbody style="margin:0px;padding:0px;border:0px;outline:0px;font-weight:inherit;font-style:inherit;font-family:inherit;vertical-align:baseline"><tr style="margin:0px;padding:0px;border:0px;outline:0px;font-weight:inherit;font-style:inherit;font-family:inherit;vertical-align:baseline"><td align="left" valign="top" style="padding:0px;border:0px;outline:0px;font-style:inherit;font-family:inherit;vertical-align:top;width:auto;line-height:1"><img alt="--" width="0" height="0" style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; font-style: inherit; font-family: inherit; vertical-align: baseline; display: block; width: 0px; height: 0px; overflow: hidden;"><div style="margin:0px;padding:0px;border:0px;outline:0px;font-weight:bold;font-style:inherit;font-size:18px;font-family:proxima-nova-1,Proxima-Nova,Helvetica,Arial,sans-serif;vertical-align:baseline;line-height:1;color:rgb(51,51,51)">Adhi Priharmanto</div><div style="margin:3px 0px 0px;padding:0px;border:0px;outline:0px;font-weight:inherit;font-style:inherit;font-size:12px;font-family:proxima-nova-1,Proxima-Nova,Helvetica,Arial,sans-serif;vertical-align:baseline;color:rgb(43,130,173)"><img alt="http://" width="0" height="0" style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; font-style: inherit; font-family: inherit; vertical-align: baseline; display: block; width: 0px; height: 0px; overflow: hidden;">about.me/a_dhi</div></td></tr><tr style="margin:0px;padding:0px;border:0px;outline:0px;font-weight:inherit;font-style:inherit;font-family:inherit;vertical-align:baseline"><td align="left" valign="top" style="padding:8px 0px 0px;border:0px;outline:0px;font-style:inherit;font-family:inherit;vertical-align:top;width:auto;line-height:1"><div style="margin:0px;padding:0px;border:0px;outline:0px;font-weight:inherit;font-style:inherit;font-family:inherit;vertical-align:baseline;text-align:right;height:4px;background-color:rgb(197,208,224)"><img src="http://d13pix9kaak6wt.cloudfront.net/signature/colorbar.png" alt="" width="88" height="4" style="margin: 0px; padding: 0px; border: 0px; outline: 0px; font-weight: inherit; font-style: inherit; font-family: inherit; vertical-align: baseline; float: right; display: block;"></div></td></tr></tbody></table></a>                           </div></td></tr><tr style="margin:0px;padding:0px;border:0px;outline:0px;font-weight:inhe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