topic Re: High Diskspace usage Sorter Swap Files in Qlik Replicate

High Diskspace usage Sorter Swap Files

CHahn — Tue, 17 Feb 2026 11:52:21 GMT

Hello,

there was an high processing load on source Oracle Database, which producing few hundert gb of archivelogs.
So tasks also created a lot of sorter swap files until the available diskspace was full.

So my question is, if there is a possibility of configuration max usage on diskspace for stroing swap files?
On Service level or at leased on task level?

BR
Christian

Re: High Diskspace usage Sorter Swap Files

john_wang — Tue, 17 Feb 2026 13:44:43 GMT

Hello Christian, @CHahn

If I understand correctly, a very large batch job was executed on the source Oracle database. As a result, the transactions became too large to remain in memory and were offloaded to disk, eventually exhausting the available disk space.

In this scenario, Qlik Replicate requires sufficient disk space to temporarily store these transactions, so adequate disk allocation is necessary.

I’m not sure how long it will take to process the accumulated archived redo logs. If sufficient disk space cannot be provided, you may consider the following options:

Configure disk-usage notifications so you can stop the task before the disk becomes full and receive alerts in advance.
Change the location of the Qlik Replicate data directory. See Qlik Replicate Moving the Data Directory on the same server to a larger drive.
Skip the redo logs if the changes can be ignored—for example, by starting the task from a specific timestamp or SCN.
If the changes cannot be skipped, the task will need to be reloaded to maintain data integrity.

Hope this helps.

John.

Re: High Diskspace usage Sorter Swap Files

CHahn — Tue, 17 Feb 2026 16:05:38 GMT

Hi John,

thank you very much for jour explainations.

But it does not protect me from next higher load on source or target, so that again much swap space is needed.
Montoring including alerting is a good idea, but in that case I wouldn't be able to react fast enough.
And to put there 1TB disk space which is most of time empty, isn't that great.

So my point it would be very useful parameter to configure how much disk space is allowed to use for swap files. Latest at that time it is used, reading next processing data is stopped. Replicate collected data from swap files until enough swap space is available again.

Only some idea for future release or features.
Thanks
Christian

Re: High Diskspace usage Sorter Swap Files

john_wang — Wed, 18 Feb 2026 01:17:26 GMT

Hello Christian, @CHahn

Thanks for the detailed information.

However, this configuration is not available in the current major versions. If this functionality is required, please submit a feature request.

Best regards,

John.