diff --git a/source/net/yacy/cora/federate/solr/connector/AbstractSolrConnector.java b/source/net/yacy/cora/federate/solr/connector/AbstractSolrConnector.java
index 1b5ece1b1..e57815f8f 100644
--- a/source/net/yacy/cora/federate/solr/connector/AbstractSolrConnector.java
+++ b/source/net/yacy/cora/federate/solr/connector/AbstractSolrConnector.java
@@ -368,6 +368,8 @@ public abstract class AbstractSolrConnector implements SolrConnector {
         final Thread t = new Thread() {
             @Override
             public void run() {
+                // CPU-intensive tasks will be performed when accessing the solr index because there decompression of content happens
+                this.setPriority(Thread.MAX_PRIORITY);
                 try {
                     for (String querystring: querystrings) {
                         this.setName("AbstractSolrConnector:concurrentIDsByQueries(" + querystring + ")");
diff --git a/source/net/yacy/kelondro/table/Table.java b/source/net/yacy/kelondro/table/Table.java
index a9d811913..27d1f2aa1 100644
--- a/source/net/yacy/kelondro/table/Table.java
+++ b/source/net/yacy/kelondro/table/Table.java
@@ -238,7 +238,7 @@ public class Table implements Index, Iterable<Row.Entry> {
                     this.table = null;
                 }
             }
-            optimize();
+            //optimize();
 
             // open the file
             this.file = new BufferedRecords(new Records(tablefile, rowdef.objectsize), this.buffersize);