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Update notes for 2017-12-20
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@ -423,18 +423,18 @@ $ schedtool -D -e ionice -c2 -n7 nice -n19 dspace index-discovery
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- Then I create a global `Resource` in the main Tomcat _server.xml_ (inside `GlobalNamingResources`):
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```
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<Resource name="jdbc/dspace" auth="Container" type="javax.sql.DataSource"
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driverClassName="org.postgresql.Driver"
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url="jdbc:postgresql://localhost:5432/dspace"
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username="dspace"
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password="dspace"
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initialSize='5'
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maxActive='50'
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maxIdle='15'
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minIdle='5'
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maxWait='5000'
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validationQuery='SELECT 1'
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testOnBorrow='true' />
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<Resource name="jdbc/dspace" auth="Container" type="javax.sql.DataSource"
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driverClassName="org.postgresql.Driver"
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url="jdbc:postgresql://localhost:5432/dspace"
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username="dspace"
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password="dspace"
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initialSize='5'
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maxActive='50'
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maxIdle='15'
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minIdle='5'
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maxWait='5000'
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validationQuery='SELECT 1'
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testOnBorrow='true' />
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```
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- Most of the parameters are from comments by Mark Wood about his JNDI setup: https://jira.duraspace.org/browse/DS-3564
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@ -623,3 +623,30 @@ javax.naming.NoInitialContextException: Need to specify class name in environmen
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- Oh cool! `select * from pg_stat_activity` shows "PostgreSQL JDBC Driver" for the application name! That's how you know it's working!
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- If you monitor the `pg_stat_activity` while you run `dspace database info` you can see that it doesn't use the JNDI and creates ~9 extra PostgreSQL connections!
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- And in the middle of all of this Linode sends an alert that CGSpace has high CPU usage from 2 to 4 PM
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## 2017-12-20
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- The database connection pooling is definitely better!
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- Now there is only one set of idle connections shared among all the web applications, instead of 10+ per application
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- There are short bursts of connections up to 10, but it generally stays around 5
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- Test and import 13 records to CGSpace for Abenet:
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```
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$ export JAVA_OPTS="-Dfile.encoding=UTF-8 -Xmx512m -XX:+TieredCompilation -XX:TieredStopAtLevel=1"
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$ dspace import -a -e aorth@mjanja.ch -s /home/aorth/cg_system_20Dec/SimpleArchiveFormat -m systemoffice.map &> systemoffice.log
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```
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- The fucking database went from 47 to 72 to 121 connections while I was importing so it stalled.
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- Since I had to restart Tomcat anyways, I decided to just deploy the new JNDI connection pooling stuff on CGSpace
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- There was an initial connection storm of 50 PostgreSQL connections, but then it settled down to 7
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- After that CGSpace came up fine and I was able to import the 13 items just fine:
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```
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$ dspace import -a -e aorth@mjanja.ch -s /home/aorth/cg_system_20Dec/SimpleArchiveFormat -m systemoffice.map &> systemoffice.log
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$ schedtool -D -e ionice -c2 -n7 nice -n19 dspace filter-media -i 10568/89287
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```
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- The final code for the JNDI work in the Ansible infrastructure scripts is here: https://github.com/ilri/rmg-ansible-public/commit/1959d9cb7a0e7a7318c77f769253e5e029bdfa3b
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@ -23,7 +23,7 @@ The list of connections to XMLUI and REST API for today:
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<meta property="article:published_time" content="2017-12-01T13:53:54+03:00"/>
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<meta property="article:modified_time" content="2017-12-19T18:33:19+02:00"/>
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<meta property="article:modified_time" content="2017-12-19T19:16:47+02:00"/>
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@ -56,9 +56,9 @@ The list of connections to XMLUI and REST API for today:
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"@type": "BlogPosting",
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"headline": "December, 2017",
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"url": "https://alanorth.github.io/cgspace-notes/2017-12/",
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"wordCount": "3411",
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"wordCount": "3593",
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"datePublished": "2017-12-01T13:53:54+03:00",
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"dateModified": "2017-12-19T18:33:19+02:00",
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"dateModified": "2017-12-19T19:16:47+02:00",
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"author": {
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"@type": "Person",
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"name": "Alan Orth"
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@ -591,18 +591,18 @@ $ schedtool -D -e ionice -c2 -n7 nice -n19 dspace index-discovery
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<li>Then I create a global <code>Resource</code> in the main Tomcat <em>server.xml</em> (inside <code>GlobalNamingResources</code>):</li>
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</ul>
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<pre><code> <Resource name="jdbc/dspace" auth="Container" type="javax.sql.DataSource"
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driverClassName="org.postgresql.Driver"
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url="jdbc:postgresql://localhost:5432/dspace"
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username="dspace"
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password="dspace"
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initialSize='5'
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maxActive='50'
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maxIdle='15'
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minIdle='5'
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maxWait='5000'
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validationQuery='SELECT 1'
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testOnBorrow='true' />
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<pre><code><Resource name="jdbc/dspace" auth="Container" type="javax.sql.DataSource"
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driverClassName="org.postgresql.Driver"
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url="jdbc:postgresql://localhost:5432/dspace"
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username="dspace"
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password="dspace"
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initialSize='5'
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maxActive='50'
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maxIdle='15'
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minIdle='5'
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maxWait='5000'
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validationQuery='SELECT 1'
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testOnBorrow='true' />
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</code></pre>
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<ul>
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@ -811,6 +811,39 @@ javax.naming.NoInitialContextException: Need to specify class name in environmen
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<li>And in the middle of all of this Linode sends an alert that CGSpace has high CPU usage from 2 to 4 PM</li>
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</ul>
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<h2 id="2017-12-20">2017-12-20</h2>
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<ul>
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<li>The database connection pooling is definitely better!</li>
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</ul>
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<p><img src="/cgspace-notes/2017/12/postgres-connections-week-dspacetest.png" alt="PostgreSQL connection pooling on DSpace Test" /></p>
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<ul>
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<li>Now there is only one set of idle connections shared among all the web applications, instead of 10+ per application</li>
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<li>There are short bursts of connections up to 10, but it generally stays around 5</li>
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<li>Test and import 13 records to CGSpace for Abenet:</li>
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</ul>
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<pre><code>$ export JAVA_OPTS="-Dfile.encoding=UTF-8 -Xmx512m -XX:+TieredCompilation -XX:TieredStopAtLevel=1"
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$ dspace import -a -e aorth@mjanja.ch -s /home/aorth/cg_system_20Dec/SimpleArchiveFormat -m systemoffice.map &> systemoffice.log
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</code></pre>
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<ul>
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<li>The fucking database went from 47 to 72 to 121 connections while I was importing so it stalled.</li>
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<li>Since I had to restart Tomcat anyways, I decided to just deploy the new JNDI connection pooling stuff on CGSpace</li>
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<li>There was an initial connection storm of 50 PostgreSQL connections, but then it settled down to 7</li>
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<li>After that CGSpace came up fine and I was able to import the 13 items just fine:</li>
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</ul>
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<pre><code>$ dspace import -a -e aorth@mjanja.ch -s /home/aorth/cg_system_20Dec/SimpleArchiveFormat -m systemoffice.map &> systemoffice.log
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$ schedtool -D -e ionice -c2 -n7 nice -n19 dspace filter-media -i 10568/89287
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</code></pre>
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<ul>
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<li>The final code for the JNDI work in the Ansible infrastructure scripts is here: <a href="https://github.com/ilri/rmg-ansible-public/commit/1959d9cb7a0e7a7318c77f769253e5e029bdfa3b">https://github.com/ilri/rmg-ansible-public/commit/1959d9cb7a0e7a7318c77f769253e5e029bdfa3b</a></li>
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</ul>
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BIN
public/2017/12/postgres-connections-week-dspacetest.png
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public/2017/12/postgres-connections-week-dspacetest.png
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@ -4,7 +4,7 @@
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<url>
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<loc>https://alanorth.github.io/cgspace-notes/2017-12/</loc>
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<lastmod>2017-12-19T18:33:19+02:00</lastmod>
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<lastmod>2017-12-19T19:16:47+02:00</lastmod>
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</url>
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<url>
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@ -139,7 +139,7 @@
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<url>
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<loc>https://alanorth.github.io/cgspace-notes/</loc>
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<lastmod>2017-12-19T18:33:19+02:00</lastmod>
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<lastmod>2017-12-19T19:16:47+02:00</lastmod>
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<priority>0</priority>
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</url>
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@ -150,7 +150,7 @@
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<url>
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<loc>https://alanorth.github.io/cgspace-notes/tags/notes/</loc>
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<lastmod>2017-12-19T18:33:19+02:00</lastmod>
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<lastmod>2017-12-19T19:16:47+02:00</lastmod>
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<priority>0</priority>
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</url>
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@ -162,13 +162,13 @@
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<url>
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<loc>https://alanorth.github.io/cgspace-notes/post/</loc>
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<lastmod>2017-12-19T18:33:19+02:00</lastmod>
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<lastmod>2017-12-19T19:16:47+02:00</lastmod>
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<priority>0</priority>
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</url>
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<url>
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<loc>https://alanorth.github.io/cgspace-notes/tags/</loc>
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<lastmod>2017-12-19T18:33:19+02:00</lastmod>
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<lastmod>2017-12-19T19:16:47+02:00</lastmod>
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<priority>0</priority>
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</url>
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BIN
static/2017/12/postgres-connections-week-dspacetest.png
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BIN
static/2017/12/postgres-connections-week-dspacetest.png
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After Width: | Height: | Size: 8.7 KiB |
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