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* problems about updating a table and cluster this table at the same time
@ 2005-08-15 17:03 jing han <jing_han_66@yahoo.com>
2005-08-15 18:26 ` Re: problems about updating a table and cluster this table at the same time Tom Lane <tgl@sss.pgh.pa.us>
0 siblings, 1 reply; 2+ messages in thread
From: jing han @ 2005-08-15 17:03 UTC (permalink / raw)
To: pgsql-interfaces
Hello,
I work on a large database. I make use of cron job to
cluster certain database table periodically.
I found when updating a table and clusterdb cron job
happens to run at exactly the same time clustering
that table, then both updating and clustering stuck.
Database server hault. This cause my system hault.
I tried to lock that table using 'lock tableName'
command before updating that table, I run 'clusterdb
-t tableName dbName', I found clusterdb ignore the
fact that the table is locked and go ahead finishing
cluster job.
So how can I protect the table when I update it to
avoid cluster cron job interrupt the update?
Any suggestion will be greatly appreciated!
jing
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^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: problems about updating a table and cluster this table at the same time
2005-08-15 17:03 problems about updating a table and cluster this table at the same time jing han <jing_han_66@yahoo.com>
@ 2005-08-15 18:26 ` Tom Lane <tgl@sss.pgh.pa.us>
0 siblings, 0 replies; 2+ messages in thread
From: Tom Lane @ 2005-08-15 18:26 UTC (permalink / raw)
To: jing han <jing_han_66@yahoo.com>; +Cc: pgsql-interfaces
jing han <jing_han_66@yahoo.com> writes:
> I found when updating a table and clusterdb cron job
> happens to run at exactly the same time clustering
> that table, then both updating and clustering stuck.
> Database server hault. This cause my system hault.
This is really hard to believe. Can you give us a repeatable test case?
regards, tom lane
^ permalink raw reply [nested|flat] 2+ messages in thread
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2005-08-15 17:03 problems about updating a table and cluster this table at the same time jing han <jing_han_66@yahoo.com>
2005-08-15 18:26 ` Tom Lane <tgl@sss.pgh.pa.us>
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