postgresql deadlock

How to disable the deadlock process in PostgreSQL, postgresql Process The PostgreSQL database used has no information. Google had to proceed. Finally, a solution was found in an English forum. As follows: 1. Retrieve the ID of the deadlock

Source: amutu. comblog201306hive-metastore-db-postgresqlHIVE metadata uses derby as the storage DB by default, derby as the lightweight DB, it is more convenient to use in the development and testing process, but in the actual production environment,

Today, a strange phenomenon is encountered, the Select and delete tables are executed normally, but the truncate and drop tables are always running without error.Check some information to find out the cause of the problem, summarized as

Due to the use of the PostgreSQL database, there is no data. Had to do Google. Finally found a solution in an English forum. As follows: 1. Retrieves the ID of the deadlock process Copy Code code as follows: SELECT * from

--Query blocked SQL (deadlock, no SQL executed through) SELECT * from Pg_stat_activity AA, (select A.locktype,a.database,a.pid,a.mode,a.relation,  B.relname from Pg_locks a joins Pg_class B on A.relation=b.oid where upper (b.relname) = '

The default database for hive is Derby, and this database is for self-debugging, but it's a bit of a challenge to face a lot of data, so next I'm going to swap derby for PostgreSQL, and I'll talk about what to look for in the replacement process.

All messages sent by the PostgreSQL server are given a five-character error code that follows the custom of the SQL "SQLSTATE" code. Apps that need to know what error conditions are occurring should usually test the error code instead of the text

OriginWhen a strange phenomenon occurs, the Select and delete tables are executed normally, but the truncate and drop tables run all the time, and no error is encountered.Reason"Drop table" and "TRUNCATE TABLE" need to apply for exclusive lock

Concurrency control is the key technology of DBMS, concurrency control technology is also called synchronization mechanism, and its implementation usually relies on the underlying concurrency control mechanism. The operating system provides a

0. Help$/home/lhl/az/pg/bin/pg_ctl--Helppg_ctl is a utility to initialize, start, stop, or control a PostgreSQL server. Usage:pg_ctl INIT[DB] [-D DataDir] [-S] [-O"OPTIONS"] Pg_ctl start [-W] [-t SECS] [-D datadir] [-S] [-l FILENAME] [-O"OPTIONS"]