From 0652179a0f14e9e1e122668637bb2e544fddf6e5 Mon Sep 17 00:00:00 2001 From: Alan Orth Date: Wed, 20 Dec 2017 16:14:32 +0200 Subject: [PATCH] Update notes for 2017-12-20 --- content/post/2017-12.md | 51 ++++++++++---- public/2017-12/index.html | 63 +++++++++++++----- .../postgres-connections-week-dspacetest.png | Bin 0 -> 8924 bytes public/sitemap.xml | 10 +-- .../postgres-connections-week-dspacetest.png | Bin 0 -> 8924 bytes 5 files changed, 92 insertions(+), 32 deletions(-) create mode 100644 public/2017/12/postgres-connections-week-dspacetest.png create mode 100644 static/2017/12/postgres-connections-week-dspacetest.png diff --git a/content/post/2017-12.md b/content/post/2017-12.md index 2ae9a444e..24a2bffb8 100644 --- a/content/post/2017-12.md +++ b/content/post/2017-12.md @@ -423,18 +423,18 @@ $ schedtool -D -e ionice -c2 -n7 nice -n19 dspace index-discovery - Then I create a global `Resource` in the main Tomcat _server.xml_ (inside `GlobalNamingResources`): ``` - + ``` - Most of the parameters are from comments by Mark Wood about his JNDI setup: https://jira.duraspace.org/browse/DS-3564 @@ -623,3 +623,30 @@ javax.naming.NoInitialContextException: Need to specify class name in environmen - Oh cool! `select * from pg_stat_activity` shows "PostgreSQL JDBC Driver" for the application name! That's how you know it's working! - 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! - And in the middle of all of this Linode sends an alert that CGSpace has high CPU usage from 2 to 4 PM + +## 2017-12-20 + +- The database connection pooling is definitely better! + +![PostgreSQL connection pooling on DSpace Test](/cgspace-notes/2017/12/postgres-connections-week-dspacetest.png) + +- Now there is only one set of idle connections shared among all the web applications, instead of 10+ per application +- There are short bursts of connections up to 10, but it generally stays around 5 +- Test and import 13 records to CGSpace for Abenet: + +``` +$ export JAVA_OPTS="-Dfile.encoding=UTF-8 -Xmx512m -XX:+TieredCompilation -XX:TieredStopAtLevel=1" +$ dspace import -a -e aorth@mjanja.ch -s /home/aorth/cg_system_20Dec/SimpleArchiveFormat -m systemoffice.map &> systemoffice.log +``` + +- The fucking database went from 47 to 72 to 121 connections while I was importing so it stalled. +- Since I had to restart Tomcat anyways, I decided to just deploy the new JNDI connection pooling stuff on CGSpace +- There was an initial connection storm of 50 PostgreSQL connections, but then it settled down to 7 +- After that CGSpace came up fine and I was able to import the 13 items just fine: + +``` +$ dspace import -a -e aorth@mjanja.ch -s /home/aorth/cg_system_20Dec/SimpleArchiveFormat -m systemoffice.map &> systemoffice.log +$ schedtool -D -e ionice -c2 -n7 nice -n19 dspace filter-media -i 10568/89287 +``` + +- The final code for the JNDI work in the Ansible infrastructure scripts is here: https://github.com/ilri/rmg-ansible-public/commit/1959d9cb7a0e7a7318c77f769253e5e029bdfa3b diff --git a/public/2017-12/index.html b/public/2017-12/index.html index 4099ec4d4..d31c71d56 100644 --- a/public/2017-12/index.html +++ b/public/2017-12/index.html @@ -23,7 +23,7 @@ The list of connections to XMLUI and REST API for today: - + @@ -56,9 +56,9 @@ The list of connections to XMLUI and REST API for today: "@type": "BlogPosting", "headline": "December, 2017", "url": "https://alanorth.github.io/cgspace-notes/2017-12/", - "wordCount": "3411", + "wordCount": "3593", "datePublished": "2017-12-01T13:53:54+03:00", - "dateModified": "2017-12-19T18:33:19+02:00", + "dateModified": "2017-12-19T19:16:47+02:00", "author": { "@type": "Person", "name": "Alan Orth" @@ -591,18 +591,18 @@ $ schedtool -D -e ionice -c2 -n7 nice -n19 dspace index-discovery
  • Then I create a global Resource in the main Tomcat server.xml (inside GlobalNamingResources):
    • -
    	<Resource name="jdbc/dspace" auth="Container" type="javax.sql.DataSource"
-		  driverClassName="org.postgresql.Driver"
-		  url="jdbc:postgresql://localhost:5432/dspace"
-		  username="dspace"
-		  password="dspace"
-          initialSize='5'
-          maxActive='50'
-          maxIdle='15'
-          minIdle='5'
-          maxWait='5000'
-          validationQuery='SELECT 1'
-          testOnBorrow='true' />
+
    <Resource name="jdbc/dspace" auth="Container" type="javax.sql.DataSource"
+	  driverClassName="org.postgresql.Driver"
+	  url="jdbc:postgresql://localhost:5432/dspace"
+	  username="dspace"
+	  password="dspace"
+      initialSize='5'
+      maxActive='50'
+      maxIdle='15'
+      minIdle='5'
+      maxWait='5000'
+      validationQuery='SELECT 1'
+      testOnBorrow='true' />
 
    
 
 
      
@@ -811,6 +811,39 @@ javax.naming.NoInitialContextException: Need to specify class name in environmen
 
    • And in the middle of all of this Linode sends an alert that CGSpace has high CPU usage from 2 to 4 PM
      • 
 
    
 
+
    2017-12-20
    
+
+
      
+
    • The database connection pooling is definitely better!
      • 
+
    
+
+
    PostgreSQL connection pooling on DSpace Test
    
+
+
      
+
    • Now there is only one set of idle connections shared among all the web applications, instead of 10+ per application
      • 
+
    • There are short bursts of connections up to 10, but it generally stays around 5
      • 
+
    • Test and import 13 records to CGSpace for Abenet:
      • 
+
    
+
+
    $ export JAVA_OPTS="-Dfile.encoding=UTF-8 -Xmx512m -XX:+TieredCompilation -XX:TieredStopAtLevel=1"
+$ dspace import -a -e aorth@mjanja.ch -s /home/aorth/cg_system_20Dec/SimpleArchiveFormat -m systemoffice.map &> systemoffice.log
+
    
+
+
      
+
    • The fucking database went from 47 to 72 to 121 connections while I was importing so it stalled.
      • 
+
    • Since I had to restart Tomcat anyways, I decided to just deploy the new JNDI connection pooling stuff on CGSpace
      • 
+
    • There was an initial connection storm of 50 PostgreSQL connections, but then it settled down to 7
      • 
+
    • After that CGSpace came up fine and I was able to import the 13 items just fine:
      • 
+
    
+
+
    $ dspace import -a -e aorth@mjanja.ch -s /home/aorth/cg_system_20Dec/SimpleArchiveFormat -m systemoffice.map &> systemoffice.log
+$ schedtool -D -e ionice -c2 -n7 nice -n19 dspace filter-media -i 10568/89287
+
    
+
+
+
   
 
   
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     https://alanorth.github.io/cgspace-notes/2017-12/
-    2017-12-19T18:33:19+02:00
+    2017-12-19T19:16:47+02:00
   
   
   
@@ -139,7 +139,7 @@
   
   
     https://alanorth.github.io/cgspace-notes/
-    2017-12-19T18:33:19+02:00
+    2017-12-19T19:16:47+02:00
     0
   
   
@@ -150,7 +150,7 @@
   
   
     https://alanorth.github.io/cgspace-notes/tags/notes/
-    2017-12-19T18:33:19+02:00
+    2017-12-19T19:16:47+02:00
     0
   
   
@@ -162,13 +162,13 @@
   
   
     https://alanorth.github.io/cgspace-notes/post/
-    2017-12-19T18:33:19+02:00
+    2017-12-19T19:16:47+02:00
     0
   
   
   
     https://alanorth.github.io/cgspace-notes/tags/
-    2017-12-19T18:33:19+02:00
+    2017-12-19T19:16:47+02:00
     0
   
   
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