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Add notes for 2022-03-04

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Alan Orth
2022-03-04 15:30:06 +03:00
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@ -34,7 +34,7 @@ Last week I had increased the limit from 30 to 60, which seemed to help, but now
$ psql -c 'SELECT * from pg_stat_activity;' | grep idle | grep -c cgspace
78
"/>
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@ -126,7 +126,7 @@ $ psql -c &#39;SELECT * from pg_stat_activity;&#39; | grep idle | grep -c cgspac
<li>Looks like DSpace exhausted its PostgreSQL connection pool</li>
<li>Last week I had increased the limit from 30 to 60, which seemed to help, but now there are many more idle connections:</li>
</ul>
<pre tabindex="0"><code>$ psql -c 'SELECT * from pg_stat_activity;' | grep idle | grep -c cgspace
<pre tabindex="0"><code>$ psql -c &#39;SELECT * from pg_stat_activity;&#39; | grep idle | grep -c cgspace
78
</code></pre><ul>
<li>For now I have increased the limit from 60 to 90, run updates, and rebooted the server</li>
@ -137,7 +137,7 @@ $ psql -c &#39;SELECT * from pg_stat_activity;&#39; | grep idle | grep -c cgspac
<li>Getting emails from uptimeRobot and uptimeButler that it&rsquo;s down, and Google Webmaster Tools is sending emails that there is an increase in crawl errors</li>
<li>Looks like there are still a bunch of idle PostgreSQL connections:</li>
</ul>
<pre tabindex="0"><code>$ psql -c 'SELECT * from pg_stat_activity;' | grep idle | grep -c cgspace
<pre tabindex="0"><code>$ psql -c &#39;SELECT * from pg_stat_activity;&#39; | grep idle | grep -c cgspace
96
</code></pre><ul>
<li>For some reason the number of idle connections is very high since we upgraded to DSpace 5</li>
@ -167,12 +167,12 @@ location ~ /(themes|static|aspects/ReportingSuite) {
<li>Need to check <code>/about</code> on CGSpace, as it&rsquo;s blank on my local test server and we might need to add something there</li>
<li>CGSpace has been up and down all day due to PostgreSQL idle connections (current DSpace pool is 90):</li>
</ul>
<pre tabindex="0"><code>$ psql -c 'SELECT * from pg_stat_activity;' | grep idle | grep -c cgspace
<pre tabindex="0"><code>$ psql -c &#39;SELECT * from pg_stat_activity;&#39; | grep idle | grep -c cgspace
93
</code></pre><ul>
<li>I looked closer at the idle connections and saw that many have been idle for hours (current time on server is <code>2015-11-25T20:20:42+0000</code>):</li>
</ul>
<pre tabindex="0"><code>$ psql -c 'SELECT * from pg_stat_activity;' | less -S
<pre tabindex="0"><code>$ psql -c &#39;SELECT * from pg_stat_activity;&#39; | less -S
datid | datname | pid | usesysid | usename | application_name | client_addr | client_hostname | client_port | backend_start | xact_start |
-------+----------+-------+----------+----------+------------------+-------------+-----------------+-------------+-------------------------------+-------------------------------+---
20951 | cgspace | 10966 | 18205 | cgspace | | 127.0.0.1 | | 37731 | 2015-11-25 13:13:02.837624+00 | | 20
@ -197,7 +197,7 @@ datid | datname | pid | usesysid | usename | application_name | client_addr
<li>Monitoring e-mailed in the evening to say CGSpace was down</li>
<li>Idle connections in PostgreSQL again:</li>
</ul>
<pre tabindex="0"><code>$ psql -c 'SELECT * from pg_stat_activity;' | grep cgspace | grep -c idle
<pre tabindex="0"><code>$ psql -c &#39;SELECT * from pg_stat_activity;&#39; | grep cgspace | grep -c idle
66
</code></pre><ul>
<li>At the time, the current DSpace pool size was 50&hellip;</li>
@ -215,7 +215,7 @@ db.statementpool = true
</code></pre><ul>
<li>And idle connections:</li>
</ul>
<pre tabindex="0"><code>$ psql -c 'SELECT * from pg_stat_activity;' | grep cgspace | grep -c idle
<pre tabindex="0"><code>$ psql -c &#39;SELECT * from pg_stat_activity;&#39; | grep cgspace | grep -c idle
49
</code></pre><ul>
<li>Perhaps I need to start drastically increasing the connection limits—like to 300—to see if DSpace&rsquo;s thirst can ever be quenched</li>