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Posted to commits@impala.apache.org by ta...@apache.org on 2020/06/09 04:04:52 UTC
[impala] 01/02: IMPALA-9817: [DOCS] add flags related to
use_local_catalog
This is an automated email from the ASF dual-hosted git repository.
tarmstrong pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/impala.git
commit 1d83168cdc3954dd6a19ac87371b225f374e2f30
Author: Shajini Thayasingh <st...@cloudera.com>
AuthorDate: Fri Jun 5 10:15:31 2020 -0700
IMPALA-9817: [DOCS] add flags related to use_local_catalog
incorporated corrections based on the feedback
added three flags related to use_local_catalog
explained that it should not be changed
talked about the default values
Change-Id: I832f94e56ec51cee5304187991388c1994a1f55c
Reviewed-on: http://gerrit.cloudera.org:8080/16037
Tested-by: Impala Public Jenkins <im...@cloudera.com>
Reviewed-by: Quanlong Huang <hu...@gmail.com>
---
docs/topics/impala_metadata.xml | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/docs/topics/impala_metadata.xml b/docs/topics/impala_metadata.xml
index fb5e856..4ded6fa 100644
--- a/docs/topics/impala_metadata.xml
+++ b/docs/topics/impala_metadata.xml
@@ -124,6 +124,29 @@ under the License.
</dd>
</dlentry>
+ <dlentry>
+ <dt>Flags related to <codeph>use_local_catalog</codeph></dt>
+ <dd>When <codeph>use_local_catalog</codeph> is enabled or set to <codeph>True</codeph> on the impalad
+ coordinators the following list of flags configure various parameters as described below. It is not
+ recommended to change the default values on these flags.
+ </dd>
+ <dd>
+ <ul>
+ <li>The flag <codeph>local_catalog_cache_mb</codeph> (defaults to -1) configures the
+ size of the catalog cache within each coordinator. With the default set to -1, the
+ cache is auto-configured to 60% of the configured Java heap size. Note that the
+ Java heap size is distinct from and typically smaller than the overall Impala
+ memory limit.</li>
+ <li>The flag <codeph>local_catalog_cache_expiration_s</codeph> (defaults to 3600) configures the
+ expiration time of the catalog cache within each impalad. Even if the configured
+ cache capacity has not been reached, items are removed from the cache if they have not
+ been accessed in the defined amount of time.</li>
+ <li>The flag <codeph>local_catalog_max_fetch_retries</codeph> (defaults to 40) configures
+ the maximum number of retries needed for queries to fetch a metadata object from the impalad
+ coordinator's local catalog cache.</li>
+ </ul>
+ </dd>
+ </dlentry>
</dl>
</p>