diff options
Diffstat (limited to 'doc/v5compatibility.html')
| -rw-r--r-- | doc/v5compatibility.html | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/doc/v5compatibility.html b/doc/v5compatibility.html index 7f5a784d..6d60062f 100644 --- a/doc/v5compatibility.html +++ b/doc/v5compatibility.html @@ -10,10 +10,21 @@ This document describes things to keep in mind when moving from v4 to v5. It does not list enhancements nor does it talk about compatibility concerns introduced by earlier versions (for this, see their respective compatibility documents). <h2>HUP processing</h2> -<p>The $HUPisRestart directive is supported by some early v5 versions, but will soon been -removed (around 5.1.x). That means that restart-type HUP processing is no longer +<p>The $HUPisRestart directive is supported by some early v5 versions, but has been removed +in 5.1.3 and above. That means that restart-type HUP processing is no longer available. This processing was redundant and had a lot a drawbacks. For details, please see the <a href="v4compatibility.html">rsyslog v4 compatibility notes</a> which elaborate on the reasons and the (few) things you may need to change. +<h2>Queue Worker Thread Shutdown</h2> +<p>Previous rsyslog versions had the capability to "run" on zero queue worker +if no work was required. This was done to save a very limited number of resources. However, +it came at the price of great complexity. In v5, we have decided to let a minium of one +worker run all the time. The additional resource consumption is probably not noticable at +all, however, this enabled us to do some important code cleanups, resulting in faster +and more reliable code (complex code is hard to maintain and error-prone). From the +regular user's point of view, this change should be barely noticable. I am including the +note for expert users, who will notice it in rsyslog debug output and other analysis tools. +So it is no error if each queue in non-direct mode now always runs at least one worker +thread. </body></html> |