[IMPALA-8910] Catalog startup option should define how many tables web-ui displays

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: Impala 2.12.0
• Component/s: Catalog
• Labels: documentaion easyfix
• Epic Color: ghx-label-13
• Assignee: Unassigned
• Reporter: Limengjun
• Created: 29/Aug/19 14:22
• Updated: 29/Aug/19 14:22

Description

Impala 2.12 starts to expose Top-N Tables with Highest Number of Metadata Operations
and Memory Requirements, which default to 25. In source code of Impala-Catalog 2.12, the value of N is set as follows:

 

private CatalogUsageMonitor() {
  final int num_tables_tracked = Integer.getInteger(
      "org.apache.impala.catalog.CatalogUsageMonitor.NUM_TABLES_TRACKED", 25);

}

We can set N as 50 by adding an arg into catalog config(/etc/default/impala), like:

 

 

IMPALA_CATALOG_JAVA_OPTS="$IMPALA_CATALOG_JAVA_OPTS -Dorg.apache.impala.catalog.CatalogUsageMonitor.NUM_TABLES_TRACKED=50"

 

So, we should document how to set NUM_TABLES_TRACKED