Re: Request to share information regarding deadlock in postgresql-9.3.6

Dear John,

Thanks for sharing solution approaches.

>do each reindex as a seperate transaction so only one table gets locked at a time.
Transaction is already in separate like REINDEX TABLE table1, REINDEX TABLE table2 etc..
But this problem is occurred.

One more question regarding below.
alter table table1 add constraint fk_key foreign key (id, roll_number) references table2 (id, roll_number) on delete restrict on update restrict;
It shows below error:
ERROR: there is no unique constraint matching given keys for referenced table "table2"

Table1 contains below structure:
create table table1
(
id char(6) not null,
roll_number varchar(20) not null,
-----
primary key (id, roll_number)

Table2 contains below structure:

create table table2
(
id char(6) not null,
roll_number varchar(20) not null,
account_id varchar(20) not null default '-',
-----
primary key (id, roll_number, account_id)

How to resolve this issue?

Regards,
Yogesh

-----Original Message-----
From: pgsql-general-owner(at)postgresql(dot)org [mailto:pgsql-general-owner(at)postgresql(dot)org] On Behalf Of John R Pierce
Sent: Thursday, November 17, 2016 12:04 PM
To: pgsql-general(at)postgresql(dot)org
Subject: Re: [GENERAL] Request to share information regarding deadlock in postgresql-9.3.6

On 11/16/2016 6:22 PM, Yogesh Sharma wrote:
> process 5764 is waiting for relation (table) with OID 16459(table2_primary_key), that table is blocked by process 4970 and process 4970 is waiting for a lock on another table, OID 16502(table1), which the first process has a lock on.
> Process 5764: INSERT INTO table2 ( id , roll_number, name) VALUES(
> '1', '4','abc' ) Process 4970: REINDEX TABLE table1, table2 etc..
>
> How to resolve this problem?

don't do reindex when the tables are in use.

or

why does process 5764 have a lock on table 1 while its inserting into table 2?

or

do each reindex as a seperate transaction so only one table gets locked at a time.

--
john r pierce, recycling bits in santa cruz

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