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https://issues.apache.org/jira/browse/HIVE-24805?focusedWorklogId=710643&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-710643
]
ASF GitHub Bot logged work on HIVE-24805:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 18/Jan/22 16:47
Start Date: 18/Jan/22 16:47
Worklog Time Spent: 10m
Work Description: asinkovits commented on a change in pull request #2906:
URL: https://github.com/apache/hive/pull/2906#discussion_r786957161
##########
File path:
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/conf/MetastoreConf.java
##########
@@ -589,6 +589,9 @@ public static ConfVars getMetaConf(String name) {
"in which a warning is being raised if multiple worker version are
detected.\n" +
"The setting has no effect if the metastore.metrics.enabled is
disabled \n" +
"or the metastore.acidmetrics.thread.on is turned off."),
+
COMPACTOR_METADATA_CACHE_TIMEOUT("metastore.compactor.metadata.cache.timeout",
+ "hive.metastore.compactor.metadata.cache.timeout", 60, TimeUnit.SECONDS,
Review comment:
The idea was to keep it at a low value so that we don't need extra
eviction logic. Now that the cache works for a single cycle of the initiator,
the sole purpose of this config is to be able to control the memory consumption
of the cache.
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Issue Time Tracking
-------------------
Worklog Id: (was: 710643)
Time Spent: 3h 10m (was: 3h)
> Compactor: Initiator shouldn't fetch table details again and again for
> partitioned tables
> -----------------------------------------------------------------------------------------
>
> Key: HIVE-24805
> URL: https://issues.apache.org/jira/browse/HIVE-24805
> Project: Hive
> Issue Type: Improvement
> Components: Transactions
> Reporter: Rajesh Balamohan
> Assignee: Antal Sinkovits
> Priority: Major
> Labels: pull-request-available
> Time Spent: 3h 10m
> Remaining Estimate: 0h
>
> Initiator shouldn't be fetch table details for all its partitions. When there
> are large number of databases/tables, it takes lot of time for Initiator to
> complete its initial iteration and load on DB also goes higher.
> https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/Initiator.java#L129
> https://github.com/apache/hive/blob/64bb52316f19426ebea0087ee15e282cbde1d852/ql/src/java/org/apache/hadoop/hive/ql/txn/compactor/Initiator.java#L456
> For all the following partitions, table details would be the same. However,
> it ends up fetching table details from HMS again and again.
> {noformat}
> 2021-02-22 08:13:16,106 INFO
> org.apache.hadoop.hive.ql.txn.compactor.Initiator: [Thread-11]: Checking to
> see if we should compact
> tpcds_bin_partitioned_orc_1000.store_returns_tmp2.sr_returned_date_sk=2451899
> 2021-02-22 08:13:16,124 INFO
> org.apache.hadoop.hive.ql.txn.compactor.Initiator: [Thread-11]: Checking to
> see if we should compact
> tpcds_bin_partitioned_orc_1000.store_returns_tmp2.sr_returned_date_sk=2451830
> 2021-02-22 08:13:16,140 INFO
> org.apache.hadoop.hive.ql.txn.compactor.Initiator: [Thread-11]: Checking to
> see if we should compact
> tpcds_bin_partitioned_orc_1000.store_returns_tmp2.sr_returned_date_sk=2452586
> 2021-02-22 08:13:16,149 INFO
> org.apache.hadoop.hive.ql.txn.compactor.Initiator: [Thread-11]: Checking to
> see if we should compact
> tpcds_bin_partitioned_orc_1000.store_returns_tmp2.sr_returned_date_sk=2452698
> 2021-02-22 08:13:16,158 INFO
> org.apache.hadoop.hive.ql.txn.compactor.Initiator: [Thread-11]: Checking to
> see if we should compact
> tpcds_bin_partitioned_orc_1000.store_returns_tmp2.sr_returned_date_sk=2452063
> {noformat}
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