On 04/07/2017 01:25 PM, Tim Nelson wrote:
New to Postgres and I have never seen this condition. We are getting
test applications hanging on SELECT statements with a RowExclusiveLock.
How can a SELECT cause a RowExclusiveLock?
relname | pid | mode | granted
--------------------------+-------+------------------+---------
sales_transaction_detail | 392 | RowExclusiveLock | t
sales_transaction_detail | 19077 | RowExclusiveLock | t
sales_transaction_header | 32661 | RowExclusiveLock | t
sales_transaction_header | 392 | RowExclusiveLock | t
sales_transaction_header | 19077 | RowExclusiveLock | t
pid | age | usename |
query
-------+------------------+----------+----------------------------------------------------------------------------------
32661 | -07:42:39.289945 | postgres | UPDATE "sales_transaction_header"
SET "create_datetime" = '2017-04-07T02:20:39.4
19077 | -07:42:15.976288 | postgres | SELECT "price_benefit"."id",
"price_benefit"."create_datetime", "price_benefit".
392 | -07:01:44.121346 | postgres | SELECT "price_benefit"."id",
"price_benefit"."create_datetime", "price_benefit".
It would help to have:
1) Schema definitions for sales_transaction_detail and
sales_transaction_header
2) The complete queries.
3) And just for grins the Postgres version.
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
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