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<p><span style="color: #282828; font-family: "microsoft yahei ui", "microsoft yahei", 微软雅黑, simsun, 宋体, sans-serif; font-size: 15px; background-color: #ffffff;">Hello Usama and Hackers,</span></p>
<p><span> </span>I have tested the pgpool connection pool.And I think there are some parts need to be enhanced.</p>
<p><span> </span>When you set the parameter num_init_children = 32.only 32 child processes will be forked and waiting for the connection from client.<span style="font-size: 12pt;">E</span><span style="font-size: 12pt;">ach child process can only receive
one client connection,t</span><span style="font-size: 12pt;">herefore, only 32 clie</span><span style="font-size: 12pt;">n</span><span style="font-size: 12pt;">ts can connect to pgpool at the same time.The extra connections,before connection, can only wait
for the previous connection to be disconnected.So,can we change the waiting connection structure of pgpool. When pgpool starts ,we can fork ten child processes to wait for the client to connect.When the child process receives the connection request, it creates
a new child process to maintain the session connection.</span></p>
<p><span style="font-size: 12pt;"><span> </span>there is also another one which should be enhance is the connection pool.</span><span style="font-size: 12pt;">Now, for each connection, the child process can only receive one client connection. Therefore,
the connection pool in the child process does not play a global reuse </span><span style="font-size: 12pt;">effect.And each connection will re-initialize the connection pool. Therefore we should implement a global connection pool to achieve the effect of back end reuse.However
,we should confirm how many connections the global connection pool should maintain.And also we should confirm that if the connection pool is full,how should we respond to the arrival of new connections</span><span style="font-size: 12pt;">.I can come up with
two kind of solutions.</span></p>
<p><span style="font-size: 12pt;"><span> </span>The first one is waiting until the connection in the connection pool disconnected.and then receive the new connection.The second one,We should check the number of connection and the last access time of the connection
in connection pool.And we replace the connection which has the oldest access time in the connection pool to the new connection.or we periodic detection the access time of each connection,and throw away the connections whose access time exceed a certain value.then
we can use the extra space in connection pool.</span></p>
<p><span style="font-size: 12pt;"> In my </span>opinion<span style="font-size: 12pt;">，these two aspects need to be enhanced.How about your opinion.And what do you think we need to do to enhance these two aspects.Any suggestions and comments are welcome.</span><br>
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<div style="color: #282828; font-family: calibri, arial, helvetica, sans-serif; font-size: 16px; background-color: #ffffff; margin-top: 0px; margin-bottom: 0px;">
<font face="Calibri,Arial,Helvetica,sans-serif"><font face="Microsoft YaHei UI,Microsoft YaHei,微软雅黑,SimSun,宋体,sans-serif" size="1"><span style="font-size: 13.32px;">Thanks</span></font><br>
<font face="Microsoft YaHei UI,Microsoft YaHei,微软雅黑,SimSun,宋体,sans-serif" size="1"><span style="font-size: 13.32px;">Best regards</span></font><br>
Zhou Jianshen</font></div>
<div style="color: #282828; font-family: calibri, arial, helvetica, sans-serif; font-size: 16px; background-color: #ffffff; margin-top: 0px; margin-bottom: 0px;">
<font face="Calibri,Arial,Helvetica,sans-serif"><a href="mailto:zhoujianshen@highgo.com" target="_blank"><font face="verdana" size="1"><span style="font-size: 13.32px;">zhoujianshen@highgo.com</span></font></a><font face="verdana" size="1"><span style="font-size: 13.32px;"></span></font></font></div>
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