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From: tushar <tushar.ahuja@enterprisedb.com>
To: Amul Sul <sulamul@gmail.com>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Amit Kapila <amit.kapila16@gmail.com>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: [Patch] ALTER SYSTEM READ ONLY
Date: Wed, 24 Jun 2020 13:54:29 +0530
Message-ID: <e974a552-3e3e-c735-5179-7708dfa26ffb@enterprisedb.com> (raw)
In-Reply-To: <CAAJ_b94aYGq_8102UfUhv=1fNAuBMX+soYiOK43LuSPumAe9pQ@mail.gmail.com>
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	<CA+TgmoaNiofJXooq3HOG-2hRZR-JGFs6yyutwg9i7L=NKSBSDg@mail.gmail.com>
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	<CA+TgmoYz9Cx=hFsbG1V5P6-UmF6hcJM5HLd9EW+4HRro5kWRwg@mail.gmail.com>
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	<CAAJ_b94aYGq_8102UfUhv=1fNAuBMX+soYiOK43LuSPumAe9pQ@mail.gmail.com>

On 6/22/20 11:59 AM, Amul Sul wrote:
> 2. Now skipping the startup checkpoint if the system is read-only mode, as
> discussed [2].

I am not able to perform pg_checksums o/p after shutting down my server 
in read only  mode .

Steps -

1.initdb (./initdb -k -D data)
2.start the server(./pg_ctl -D data start)
3.connect to psql (./psql postgres)
4.Fire query (alter system read only;)
5.shutdown the server(./pg_ctl -D data stop)
6.pg_checksums

[edb@tushar-ldap-docker bin]$ ./pg_checksums -D data
pg_checksums: error: cluster must be shut down
[edb@tushar-ldap-docker bin]$

Result - (when server is not in read only)

[edb@tushar-ldap-docker bin]$ ./pg_checksums -D data
Checksum operation completed
Files scanned:  916
Blocks scanned: 2976
Bad checksums:  0
Data checksum version: 1

-- 
regards,tushar
EnterpriseDB  https://www.enterprisedb.com/
The Enterprise PostgreSQL Company






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  To: pgsql-hackers@postgresql.org
  Cc: tushar.ahuja@enterprisedb.com, sulamul@gmail.com, robertmhaas@gmail.com, amit.kapila16@gmail.com
  Subject: Re: [Patch] ALTER SYSTEM READ ONLY
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