<div dir="ltr">Hi All,<div><br></div><div>I'm running pgpool-II version 3.3.4 (tokakiboshi) with two 9.3.1.3 nodes.</div><div><br></div><div>I have the following in my config file:</div><div><br></div><div><div><font face="monospace, monospace"># - Backend Connection Settings -</font></div><div><font face="monospace, monospace"><br></font></div><div><font face="monospace, monospace">backend_hostname0 = '10.51.9.125'</font></div><div><font face="monospace, monospace">backend_port0 = 5432</font></div><div><font face="monospace, monospace">backend_weight0 = 1</font></div><div><font face="monospace, monospace">backend_data_directory0 = '/apps/pg_data/data'</font></div><div><font face="monospace, monospace">backend_flag0 = 'ALLOW_TO_FAILOVER'</font></div><div><font face="monospace, monospace"><br></font></div><div><font face="monospace, monospace">backend_hostname1 = '10.51.10.116'</font></div><div><font face="monospace, monospace">backend_port1 = 5432</font></div><div><font face="monospace, monospace">backend_weight1 = 1</font></div><div><font face="monospace, monospace">backend_data_directory1 = '/apps/pg_data/data'</font></div><div><font face="monospace, monospace">backend_flag1 = 'ALLOW_TO_FAILOVER'</font></div><div><font face="monospace, monospace"><br></font></div><div><font face="monospace, monospace">...</font></div><div><font face="monospace, monospace"><br></font></div><div><div style="font-family:monospace,monospace">master_slave_mode = on </div><div style="font-family:monospace,monospace">master_slave_sub_mode = 'stream'</div><div style="font-family:monospace,monospace"><br></div><div style="font-family:monospace,monospace">...</div><div style="font-family:monospace,monospace"><br></div><div><div style="font-family:monospace,monospace">health_check_period = 5</div><div style="font-family:monospace,monospace">health_check_timeout = 10</div><div style="font-family:monospace,monospace">health_check_max_retries = 5</div><div style="font-family:monospace,monospace">health_check_retry_delay = 1</div><div style="font-family:monospace,monospace"><br></div><div style="font-family:monospace,monospace">...</div><div style="font-family:monospace,monospace"><br></div><div style="font-family:monospace,monospace">fail_over_on_backend_error = off</div><div style="font-family:monospace,monospace"><br></div><div><font face="arial, helvetica, sans-serif">This mostly works as expected. I am using a third party clustering solution which uses pcp_detach_node for fencing - although I don't think that is relevant here.</font></div><div><br></div><div>I get the following node info when up:</div><div><br></div><div><div><font face="monospace, monospace">node_id | hostname | port | status | lb_weight | role</font></div><div><font face="monospace, monospace">---------+--------------+------+--------+-----------+---------</font></div><div><font face="monospace, monospace"> 0 | 10.51.9.125 | 5432 | 2 | 0.500000 | primary</font></div><div><font face="monospace, monospace"> 1 | 10.51.10.116 | 5432 | 3 | 0.500000 | standby</font></div><div><font face="monospace, monospace">(2 rows)</font></div></div><div><br></div><div><font face="arial, helvetica, sans-serif">The problem comes when my standby node becomes unavailable - let's say I shut it down.</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">Now until all my health checks have failed I am not able to connect to the database:</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><div><font face="monospace, monospace">-bash-4.1$ psql</font></div><div><font face="monospace, monospace">psql.bin: -bash-4.1$</font></div><div><font face="monospace, monospace"><br></font></div><div><font face="arial, helvetica, sans-serif">My network is pretty temperamental, so I actually would like to lengthen the time to failure - but this means I get a complete outage every time my network flutters?</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">I could also change the setting of </font><span style="font-family:monospace,monospace">fail_over_on_backend_error</span><span style="font-family:monospace,monospace"> </span><font face="arial, helvetica, sans-serif">but then although the failure is immediate there is no coming back without intervention once my server is set to a status of 3.</font></div></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">Is there a way of avoiding this behavior and allowing traffic to continue to be processed on my functioning master when the standby is in question?</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">Cheers,</font></div></div></div><div><div><div><div class="gmail_signature"><div style="color:rgb(184,39,106);font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:14px;line-height:normal;font-family:Arial,Helvetica,sans-serif">
<br>
<span style="color:rgb(50,59,98)">James Sewell,</span><br>
<span style="color:rgb(169,169,169)"><span style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:normal;font-family:Arial,Helvetica,sans-serif">PostgreSQL Team Lead / Solutions Architect </span></span><br>
<span style="color:rgb(169,169,169)">______________________________________</span><br>
</div>
<img alt="" src="http://www.lisasoft.com/sites/lisasoft/files/u1/logo1.jpg" style="margin: 0px; width: 153px; height: 50px;"><br>
<div style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:20px;font-family:Arial,Helvetica,sans-serif;color:rgb(64,64,64);margin:0px">
<span style="color:rgb(169,169,169)">Level 2, 50 Queen St, Melbourne VIC 3000</span><br>
<br>
<strong>P </strong><span style="color:rgb(169,169,169)"><span style="font-family:Arial,Verdana,sans-serif">(+61) 3 8370 8000</span></span><span style="color:rgb(169,169,169)"> </span><strong> </strong><span style="color:rgb(50,59,98)"><span style="width:15px;display:inline-block"><strong>W</strong></span></span> <a style="color:rgb(64,64,64);margin:2px 0px;text-decoration:none"><span style="color:rgb(169,169,169)">www.lisasoft.com</span></a> <span style="color:rgb(50,59,98)"><span style="width:15px;display:inline-block"><strong>F </strong></span></span><span style="color:rgb(169,169,169)"><span style="font-family:Arial,Verdana,sans-serif">(+61) 3 8370 8099</span></span></div>
<div style="padding-top:8px">
</div></div></div>
</div></div></div></div>
<br>
<p><div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:14.545454025268555px;background-color:rgb(255,255,255)"><hr><font size="1" color="Gray" face="Arial">The contents of this email are confidential and may be subject to legal or professional privilege and copyright. No representation is made that this email is free of viruses or other defects. If you have received this communication in error, you may not copy or distribute any part of it or otherwise disclose its contents to anyone. Please advise the sender of your incorrect receipt of this correspondence.</font></div></p>