[wix-users] MSI logging

[Christopher Painter]

FWIW, I've needed "!"  one time in 15 years.  An installer engineer sent a log file my way that ended abruptly without any errors. It simply mentioned creating a restore snapshot and that was the end of it.


Adding the "!" revealed that a custom action (no surprise really)  had actually started and crashed so hard that it took msiexec down with it.  A transform was created to bypass this custom action and everything went fine after that.



________________________________
From: wix-users <wix-users-bounces at lists.wixtoolset.org> on behalf of Rob Mensching via wix-users <wix-users at lists.wixtoolset.org>
Sent: Monday, May 28, 2018 11:06 AM
To: WiX Toolset Users Mailing List
Cc: Rob Mensching
Subject: Re: [wix-users] MSI logging

"!" means flush after every log write. It is extremely expensive.

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-----Original Message-----
From: wix-users <wix-users-bounces at lists.wixtoolset.org> On Behalf Of Fyodor Koryazhkin via wix-users
Sent: Monday, May 28, 2018 2:28 AM
To: WiX Toolset Users Mailing List <wix-users at lists.wixtoolset.org>
Cc: Fyodor Koryazhkin <fyodorkor at gmail.com>
Subject: [wix-users] MSI logging

Hi,
I have noticed that specifying + (attach to existing file) option along with ! (flash each line immediately) option in log file increases installation time dramatically. (up to 10 times).

Is it bug in MSI engine or it works by design this way?

This is quite critical issue for us - we run several installations consecutive and want to keep all logging in one place. Also it is important to have hundred percent match in timing for trouble shouting because !
option writes down actions as they are performed.

--
Regards,
Fyodor Koryazhkin..

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