The message now logs the instructions on how to increase the per-process
page limit for pipe buffers. This can happen if fs.pipe-max-size
multiplied by the number of workers exceeds the value of
fs.pipe-user-pages-soft multiplied by 4096.
Logging the pipe buffer size on startup will tell how large it was at the
time when MaxScale read it. If there are some abnormalities in it, this
will make it visible.
Logging the worker ID when the posting of a message fails will tell which
particular worker it was. For example, if the worker in question is the
main worker (i.e. ID 0), we know there's something that's blocking the
processing.
The stacktrace now removes leading paths from object files and common
source code prefixes. It also skips the first five frames which are always
inside the stacktrace printing code and the signal handler.
By having a separate FINISHED state and a STOPPED state, it is possible to
know at which point in the worker's lifetime an event is done. Posting of
messages before a worker is started is allowed but posting them after the
worker has stopped is not.
This fixes avrorouter related failures and all other failures that stem
from worker messages being ignored at startup.
log.cc:this_unit.slogger depends upon logger.cc:this_unit.ident.
Depending on which one is destructed first, there will be a crash
or then not.
It seems that the destruction order when returning from main()
is not necessarily the same as that when calling exit() in main,
as this bug is triggered with compilers versions and not with other.
Exclude systemd usage if the library is not installed.
Only excluding what is necessary. This keeps the object size the
same and still compiles most of the code.
Systemd wathdog notification at a little more than 2/3 of the
systemd configured time. In the service config (maxscale.service)
add e.g. WatchdogSec=30s to set and enable the watchdog.
For building: install libsystemd-dev.
The next commit will modify cmake configuration and code to
conditionally compile the new code based on existence of libsystemd-dev.
The removed statistics variables have no meaning anymore and
were not updated.
Decided to simply drop the variable from the JSON output. It
gets far too rigid if fields of objects cannot be changed without
bumping the REST-API version.
Created the <maxbase/format.hh> header that contains various helper
functions for formatting values into human readable forms. Currently only
binary to human readable size conversion is implemented.
Clean up, comments and enhancements. StopWatch lap() didn't mean lap-time, but elapsed time. Changed meaning to lap-time and added split() for split-time.
See script directory for method. The script to run in the top level
MaxScale directory is called maxscale-uncrustify.sh, which uses
another script, list-src, from the same directory (so you need to set
your PATH). The uncrustify version was 0.66.
Changes that allow slow or new servers to quickly apply samples towards the
server average. The most important changes are to not ignore the first N samples,
and apply an average to the server as soon as there is one available.
The new ResponseStat::make_valid() will use filter samples to add an average,
if no averages have yet been added, even if the number of filter samples is less
than the filter limit.
This is to support calculating the average from a session, and the slave selection criteria to be able to route based on averages. This commit, like the next one, have TODOs which you should feel free to comment on. Undecided things.
Everything of maxbase can now be initialized by a call to
maxbase_init();
(from a C-program) or
maxbase::init();
from a C++-program and finalized with calls to either
maxbase_finish() or maxbase::finish(). Creating an instance
maxbase::MaxBase will take care of both operations.
