OSDir

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [users@httpd] Logging in apache


On Thu, Apr 19, 2018 at 8:36 AM, Rainer Canavan
<rainer.canavan@xxxxxxxxxxxx> wrote:
> On Wed, Apr 18, 2018 at 9:29 PM, Eric Covener <covener@xxxxxxxxx> wrote:
>> On Wed, Apr 18, 2018 at 3:18 PM, Hemant Chaudhary
>> <hemantdude.chaudhary@xxxxxxxxx> wrote:
>>> Thanks Eric
>>>
>>> It means thread are using lock so that one thread/process can write a time.
>> I believe it's unlocked, I think posix promises they will not be
>> interleaved if written through a shared file descriptor.
>
> If I recall correctly, that's only true as long as the log lines are shorter
> than PIPE_BUF (apparently 4096 on Linux). Very long log lines are
> actually sometimes written interleaved by httpd.

Good point. There was a very recent patch to make that work better
with piped loggers.

---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx
For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx