Klass-solr prod: More memory and more heap (#359)

Author: mmwinther

.nais/prod/klass-solr.yaml

@@ -16,16 +16,24 @@ spec:
   filesFrom:
     - persistentVolumeClaim: klass-solr-pvc
       mountPath: /opt/solr/server/solr/mycores/Klass/data
+  env:
+    # Solr crashed with JAVA_TOOL_OPTIONS ref: https://github.com/apache/lucene-solr/pull/405
+    # so we use this variable ref: https://solr.apache.org/guide/6_6/taking-solr-to-production.html#TakingSolrtoProduction-MemoryandGCSettings
+    # Solr sets -Xmx512m by default so we MUST override this setting, otherwise the heap allocation will remain constrained
+    # Value should be 50% of memory request
+    - name: SOLR_JAVA_MEM
+      value: "-Xms1g -Xmx1g"
 
   replicas:
     min: 1
     max: 1
   resources:
     requests:
       cpu: 400m
-      memory: 1024Mi
+      # Update SOLR_JAVA_MEM when changing this
+      memory: 2Gi
     limits:
-      memory: 2048Mi
+      memory: 2Gi
 
   accessPolicy:
     inbound: