Add notes for 2019-04-14

content/posts/2019-04.md

@@ -621,4 +621,28 @@ $ ./delete-metadata-values.py -i /tmp/2019-04-11-delete-6-subjects.csv -db dspac
 
 ![Java GC during Solr indexing Solr 4.10.4 settings](/cgspace-notes/2019/04/visualvm-solr-indexing-solr-settings.png)
 
+## 2019-04-14
+
+- Change DSpace Test (linode19) to use the Java GC tuning from the Solr 4.14.4 startup script:
+
+```
+GC_TUNE="-XX:NewRatio=3 \
+    -XX:SurvivorRatio=4 \
+    -XX:TargetSurvivorRatio=90 \
+    -XX:MaxTenuringThreshold=8 \
+    -XX:+UseConcMarkSweepGC \
+    -XX:+UseParNewGC \
+    -XX:ConcGCThreads=4 -XX:ParallelGCThreads=4 \
+    -XX:+CMSScavengeBeforeRemark \
+    -XX:PretenureSizeThreshold=64m \
+    -XX:+UseCMSInitiatingOccupancyOnly \
+    -XX:CMSInitiatingOccupancyFraction=50 \
+    -XX:CMSMaxAbortablePrecleanTime=6000 \
+    -XX:+CMSParallelRemarkEnabled \
+    -XX:+ParallelRefProcEnabled"
+```
+
+- I need to remember to check the Munin JVM graphs in a few days
+- It might be placebo, but the site *does* feel snappier...
+
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