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https://issues.apache.org/jira/browse/HIVE-2471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kevin Wilfong updated HIVE-2471:
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Description: Occasionally, when entries are added to the partition stats
table the program is halted before it can delete those entries, by an
exception, keyboard interrupt, etc. These build up to the point where the
table gets very large, and it hurts the performance of the update statement
which is often called. In order to fix this, I am adding a column to the table
which is auto-populated with the current timestamp. I am also adding an index
on this column. This will allow us to create scripts that go through
periodically and clean out old entries from the table. (was: Occasionally,
when entries are added to the partition stats table the program is halted
before it can delete those entries, by an exception, keyboard interrupt, etc.
These build up to the point where the table gets very large, and it hurts the
performance of the update statement which is often called. In order to fix
this, I am adding a column to the table which is auto-populated with the
current timestamp. I am also adding an index on this column. This will allow
us to create scripts that go through periodically and clean out old entries
from the table. The index will help to keep the runtime of these scripts
short, and hence reduce the amount of time they need to lock the table/indexes
for.)
Summary: Add timestamp column to the partition stats table. (was: Add
timestamp column with index to the partition stats table.)
> Add timestamp column to the partition stats table.
> --------------------------------------------------
>
> Key: HIVE-2471
> URL: https://issues.apache.org/jira/browse/HIVE-2471
> Project: Hive
> Issue Type: Improvement
> Reporter: Kevin Wilfong
> Assignee: Kevin Wilfong
> Attachments: HIVE-2471.1.patch.txt, HIVE-2471.D2367.1.patch
>
>
> Occasionally, when entries are added to the partition stats table the program
> is halted before it can delete those entries, by an exception, keyboard
> interrupt, etc. These build up to the point where the table gets very large,
> and it hurts the performance of the update statement which is often called.
> In order to fix this, I am adding a column to the table which is
> auto-populated with the current timestamp. I am also adding an index on this
> column. This will allow us to create scripts that go through periodically
> and clean out old entries from the table.
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