BUG #12821: Cannot install xlogdump
BUG #12821: Cannot install xlogdump
От:
nlp.sr@shaw.ca
Дата:
The following bug has been logged on the website: Bug reference: 12821 Logged by: HA QUAN LE Email address: nlp.sr@shaw.ca PostgreSQL version: 9.3.4 Operating system: Ubuntu 12 Description: Dear Postgres supports,  We are trying to install xlogdump to read a WAL log file during the last weekend. We have Postgres 9.3 on Ubuntu 12, however it seems that the xlogdump only supports up to Postgres 9.2 On my installation of Postgres 9.3, xlogdump informs mismatched folders. But during weekend, we suddenly had huge WAL log file that we have to open it to read. May you send us a correct link to install a good tool to read our WAL file on Postgres 9.3,  Ubuntu 12. Thank you indeed and urgently, Ha Quan Le, IT Manager, Canwrx.
Re: BUG #12821: Cannot install xlogdump
От:
Michael Paquier <michael.paquier@gmail.com>
Дата:
On Tue, Mar 3, 2015 at 9:57 AM, wrote: > We have Postgres 9.3 on Ubuntu 12, however it seems that the xlogdump only > supports up to Postgres 9.2 Let's be sure that you are not mistaking xlogdump, which is here (https://github.com/snaga/xlogdump/) and only compatible up to 9.2, and pg_xlogdump, which is available in-core since 9.3 as a contrib module: http://www.postgresql.org/docs/9.3/static/pgxlogdump.html > On my installation of Postgres 9.3, xlogdump informs mismatched folders. > But during weekend, we suddenly had huge WAL log file that we have to open > it to read. > May you send us a correct link to install a good tool to read our WAL file > on Postgres 9.3, Ubuntu 12. If you are using 9.3, you should have a package for contrib modules, simply deploy it and then use pg_xlogdump. Referring the problem with "mismatched folders", you will need to give more details because it is hard to guess what the problem is based on the little information provided, let us know for example what you tried to do and what is the error you saw. Regards, -- Michael
Re: BUG #12821: Cannot install xlogdump
От:
Ha Quan Le <nlp.sr@shaw.ca>
Дата:
Dear Mr Paquier, May I ask this question I installed postgres-conrib by sudo apt-get install postgresql-contrib-9.3 sudo service postgresql stop sudo service postgresql start Now I found my pg_xlogdump at $ sudo find / -name pg_xlog* /usr/lib/postgresql/9.3/bin/pg_xlogdump /usr/share/postgresql/9.3/man/man1/pg_xlogdump.1.gz /usr/share/man/man1/pg_xlogdump.1.gz /db/postgres_wal/pg_xlog /db/postgres_data/main/pg_xlog /etc/alternatives/pg_xlogdump.1.gz Hence I ran $ cd /usr/lib/postgresql/9.3/bin/ $ sudo pg_xlogdump /db/postgres_wal/pg_xlog/00000001000000000000000B But error sudo: pg_xlogdump: command not found I tried again without sudo $ pg_xlogdump /db/postgres_wal/pg_xlog/00000001000000000000000B error -bash: pg_xlogdump: command not found May you support, Ha. ----- Original Message ----- From: "Michael Paquier" To: "nlp sr" Cc: pgsql-bugs@postgresql.org Sent: Tuesday, March 3, 2015 12:51:02 AM Subject: Re: [BUGS] BUG #12821: Cannot install xlogdump On Tue, Mar 3, 2015 at 9:57 AM, wrote: > We have Postgres 9.3 on Ubuntu 12, however it seems that the xlogdump only > supports up to Postgres 9.2 Let's be sure that you are not mistaking xlogdump, which is here (https://github.com/snaga/xlogdump/) and only compatible up to 9.2, and pg_xlogdump, which is available in-core since 9.3 as a contrib module: http://www.postgresql.org/docs/9.3/static/pgxlogdump.html > On my installation of Postgres 9.3, xlogdump informs mismatched folders. > But during weekend, we suddenly had huge WAL log file that we have to open > it to read. > May you send us a correct link to install a good tool to read our WAL file > on Postgres 9.3, Ubuntu 12. If you are using 9.3, you should have a package for contrib modules, simply deploy it and then use pg_xlogdump. Referring the problem with "mismatched folders", you will need to give more details because it is hard to guess what the problem is based on the little information provided, let us know for example what you tried to do and what is the error you saw. Regards, -- Michael
Re: BUG #12821: Cannot install xlogdump
От:
Ha Quan Le <nlp.sr@shaw.ca>
Дата:
Dear Mr Paquier, We found out, sorry please ignore the previous email, I then now ran to read out the first 100000 entries $ cd /usr/lib/postgresql/9.3/bin/ $ sudo ./pg_xlogdump /db/postgres_wal/pg_xlog/00000001000000000000000A -n 100000 to show the content rmgr: XLOG len (rec/tot): 72/ 104, tx: 0, lsn: 0/0A000028, prev 0/09000090, bkp: 0000, desc: checkpoint: redo 0/A000028; tli 1; prev tli 1; fpw true; xid 0/696; oid 16388; multi 1; offset 0; oldest xid 676 in DB 1; oldest multi 1 in DB 1; oldest running xid 0; shutdown rmgr: XLOG len (rec/tot): 0/ 32, tx: 0, lsn: 0/0A000090, prev 0/0A000028, bkp: 0000, desc: xlog switch is there any statement so that I just run pg_xlogdump with which options so that it will show all the WAL log file from the beginning until the end of the WAL log instead of viewing each segment and short info? I suppose that a 16MB WAL log but only a piece as above? Ha. ----- Original Message ----- From: "Michael Paquier" To: "nlp sr" Cc: pgsql-bugs@postgresql.org Sent: Tuesday, March 3, 2015 12:51:02 AM Subject: Re: [BUGS] BUG #12821: Cannot install xlogdump On Tue, Mar 3, 2015 at 9:57 AM, wrote: > We have Postgres 9.3 on Ubuntu 12, however it seems that the xlogdump only > supports up to Postgres 9.2 Let's be sure that you are not mistaking xlogdump, which is here (https://github.com/snaga/xlogdump/) and only compatible up to 9.2, and pg_xlogdump, which is available in-core since 9.3 as a contrib module: http://www.postgresql.org/docs/9.3/static/pgxlogdump.html > On my installation of Postgres 9.3, xlogdump informs mismatched folders. > But during weekend, we suddenly had huge WAL log file that we have to open > it to read. > May you send us a correct link to install a good tool to read our WAL file > on Postgres 9.3, Ubuntu 12. If you are using 9.3, you should have a package for contrib modules, simply deploy it and then use pg_xlogdump. Referring the problem with "mismatched folders", you will need to give more details because it is hard to guess what the problem is based on the little information provided, let us know for example what you tried to do and what is the error you saw. Regards, -- Michael
Re: BUG #12821: Cannot install xlogdump
От:
Michael Paquier <michael.paquier@gmail.com>
Дата:
> is there any statement so that I just run pg_xlogdump with which options so > that it will show all the WAL log file from the beginning until the end of > the WAL log instead of viewing each segment and short info? I suppose that a > 16MB WAL log but only a piece as above? If you want to see all the content of a given file, simply do not use -n, you can as well have a look at series of files, like that: pg_xlogdump $FIRST_SEGMENT_FILE $LAST_SEGMENT_FILE Note that all those things are explained in the documentation: http://www.postgresql.org/docs/9.3/static/pgxlogdump.html -- Michael
Re: BUG #12821: Cannot install xlogdump
От:
Ha Quan Le <nlp.sr@shaw.ca>
Дата:
Dear Mr Paquier, We are now having 2 databases a) postgres database on 10.236.49.12 (chosen as the master) b) postgres database on 172.24.22.68 (chosen as the replicated one) Each server was setup PGBouncer already; 2 servers are configured identically (Ubuntu 14.04.1) may I ask you: How can we connect pgBouncer on the two databases so that changes on 10.236.49.12's postgres database will be automatically replicated onto the 172.24.22.68 ? How to link the two server by pgBouncer and is there any other guideline? You bet Ha. ----- Original Message ----- From: "Michael Paquier" To: "Ha Quan Le" Cc: pgsql-bugs@postgresql.org Sent: Tuesday, March 3, 2015 6:41:05 PM Subject: Re: Re[4]: [BUGS] BUG #12821: Cannot install xlogdump > is there any statement so that I just run pg_xlogdump with which options so > that it will show all the WAL log file from the beginning until the end of > the WAL log instead of viewing each segment and short info? I suppose that a > 16MB WAL log but only a piece as above? If you want to see all the content of a given file, simply do not use -n, you can as well have a look at series of files, like that: pg_xlogdump $FIRST_SEGMENT_FILE $LAST_SEGMENT_FILE Note that all those things are explained in the documentation: http://www.postgresql.org/docs/9.3/static/pgxlogdump.html -- Michael
