Glad to hear that you can spin up the database and get to your data. Sorry to hear that you did end up losing data on that server.

-David Hornsby

On 1/19/2012 5:46 PM, Samuel Hwang wrote:
correct typo.
We pretty much lost the data for the last two days, but since our postgresql wereN'T running well, it is fewer than it looks.


On Thu, Jan 19, 2012 at 3:45 PM, Samuel Hwang <sam...@replicon.com <mailto:sam...@replicon.com>> wrote:

    pg_resetxlog does the trick and db can be started and readable.

    I am dumping the data out and import to a newly created database
    cluster.

    We pretty much lost the data for the last two days, but since our
    postgresql were running well, it is fewer than it looks.

    Thanks a lot for the help.

    On Thu, Jan 19, 2012 at 7:30 AM, David Hornsby
    <da...@beechglen.com <mailto:da...@beechglen.com>> wrote:

        Sounds like you have a corrupt wal files that you will have to
        reset the
        wal logs with pgresetxlog.

        http://www.postgresql.org/docs/8.2/static/app-pgresetxlog.html

        This will result in missing transactions so before you do this
        shutdown
        postgres and make a copy of the database files first. That way
        if you
        don't like what happens you can always go back to the way
        things were.

        Also right now would be a good time to evaluate your backup
        strategy,
        which is a different topic for a different thread, but I can
        certainly
        help with that as well.

        -David Hornsby

        > version Postgresql 9.1.1 on centos5 x64
        >
        > We experience slow performance and found the server is
        running 3 vacuum
        > process on the same db which use up 99% of CPU.
        > Then we kill -9 one of those process which cause postgresql
        to crash and
        > it
        > tried to restart after the crash
        > However when the starting process reach the last WAL files,
        it just stuck
        > there
        >
        > pg_controldata shows the db is in Archive Recovery mode and
        when using
        > psql
        > to connect the db, it says FATAL: the database system
        starting up.
        >
        > I took a chance and upgrade to PostgreSql 9.1.2 and see if
        anything
        > changed
        > it still stuck at the end of recovery.
        > pg_controldata shows db is in Crash recovery, but that
        probably different
        > wording I think
        > using psql to connect the db, it says FATAL: the database
        system is
        > starting up.
        >
        > I pretty much run out of idea here.
        > Can anyone help what to go from here?
        >
        > Samuel
        >





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