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From Erick Erickson <>
Subject Re: A few operations questions about the tlog (UpdateLog)
Date Fri, 01 Mar 2013 01:35:03 GMT
A new tlog gets created and the current one is closed on a hard commit
(openSearcher=true or false doesn't matter). The old one will be kept
around for a bit, I suspect if you'd done it a third time the first one
would go away. For all I know, the code might read if (tlog docs > 100) and
you may be hitting an off-by-one situation.

But you're right. If you follow older practices and _never_ commit until
the end of a really long indexing process, you'll see these logs grow huge.
Even worse, anytime they're replayed they'll then re-index a lot of

So I'd try the experiment over again with 110 docs.... But I can say
they're getting purged on my machine quite regularly with some stress
testing I'm doing.


On Thu, Feb 28, 2013 at 7:59 AM, adityab <> wrote:

> whats the life cycle of a tlog file. Is it purged after commit (even with
> soft commit) ?
> I posted 100 docs to solr (standalone) did hard commit. Observed a new tlog
> file is created.
> re-posted the same 100 docs and did hard commit. Observed a new tlog file
> is
> created. Old one still exists.
> When do they get purged. Concern is we have at least 20K docs published
> every 2hrs so need to understand if its safe to put them in a different
> location where we can have a script to purge old files at regular interval.
> thanks
> --
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