Re: Oracle to postgres migration via ora2pg (blob data)

From: Amol Tarte <amoltarte(at)gmail(dot)com>
To: Niels Jespersen <NJN(at)dst(dot)dk>
Cc: Daulat Ram <Daulat(dot)Ram(at)exponential(dot)com>, "pgsql-general(at)lists(dot)postgresql(dot)org" <pgsql-general(at)lists(dot)postgresql(dot)org>, "pgsql-performance(at)lists(dot)postgresql(dot)org" <pgsql-performance(at)lists(dot)postgresql(dot)org>
Subject: Re: Oracle to postgres migration via ora2pg (blob data)
Date: 2019-07-31 16:02:10
Message-ID: CAOavZFT4xdabOU67Gdr=-YFnsiEpks7Nuq28KqhcPs1v1Bpm+A@mail.gmail.com
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FullConvert does this job much faster than ora2pg

With Warm Regards,
Amol Tarte,
Project Lead,
Rajdeep InfoTechno Pvt. Ltd.
Visit us at http://it.rajdeepgroup.com

On Wed 31 Jul, 2019, 5:16 PM Niels Jespersen, <NJN(at)dst(dot)dk> wrote:

> I would look at the source table in Oracle first. It looks a lot like
> audit data. Perhaps all content is not needed in Postgres. If it is, then
> the table and lobs may benefit from being reorganised in oracle.
>
>
>
> Alter table CLIENT_DB_AUDIT_LOG move;
>
> Alter table CLIENT_DB_AUDIT_LOG move lob (SYS_LOB0000095961C00008$$);
>
> -- Three more of these.
>
>
>
> The syntax is from my the back of my head. You may need to look the
> details up.
>
>
>
> Niels
>
>
>
>
>
> *Fra:* Daulat Ram <Daulat(dot)Ram(at)exponential(dot)com>
> *Sendt:* 31. juli 2019 13:32
> *Til:* pgsql-general(at)lists(dot)postgresql(dot)org;
> pgsql-performance(at)lists(dot)postgresql(dot)org
> *Emne:* Oracle to postgres migration via ora2pg (blob data)
>
>
>
> Hello team,
>
>
>
> We have to migrate a schema from oracle to postgres but there is one table
> that is having following large lob segments. This table is taking time to
> export. What parameters we have to set in ora2pg.conf to speed up the data
> export by ora2pg.
>
>
>
> Table: CLIENT_DB_AUDIT_LOG
>
>
>
> LOBSEGMENT SYS_LOB0000095961C00008$$ 80.26
>
> LOBSEGMENT SYS_LOB0000095961C00007$$ 79.96
>
> LOBSEGMENT SYS_LOB0000094338C00008$$ 8.84
>
> LOBSEGMENT SYS_LOB0000084338C00007$$ 8.71
>
> LOBSEGMENT SYS_LOB0000085961C00009$$ 5.32
>
>
>
> VM Details are:
>
>
>
> RAM 8GB
>
> VCPUs 2 VCPU
>
> Disk 40GB
>
>
>
> Thanks,
>
>
>

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