whether stack usage is accounted and warnings about too high stack usage are logged Coroutine stack
true
event_thread_pool.threads
number of threads to process low level IO system calls (number of ev loops to start in libev)
2
event_thread_pool.thread_name
set OS thread name to this value
'event-worker'
components
dictionary of "component name": "options"
-
default_task_processor
name of the default task processor to use in components
-
task_processors.*NAME*.*OPTIONS*
dictionary of task processors to create and their options. See description below
-
mlock_debug_info
whether to mlock(2) process debug info to prevent major page faults on unwinding
true
disable_phdr_cache
whether to disable caching of phdr_info objects. Usable if rebuilding with cmake variable USERVER_DISABLE_PHDR_CACHE is off limits, and has the same effect
false
static_config_validation.validate_all_components
whether to validate static config according to schema; should be true for all new services
true
preheat_stacktrace_collector
whether to collect a dummy stacktrace at server start up (usable to avoid loading debug info at random point at runtime)
true
userver_experiments.*NAME*
whether to enable certain userver experiments; these are gradually enabled by userver team, for internal use only
false
graceful_shutdown_interval
at shutdown, first hang for this duration with /ping 5xx to give the balancer a chance to redirect new requests to other hosts
0s
Static task_processor options:
Name
Description
Default value
guess-cpu-limit
guess optimal threads count
false
thread_name
set OS thread name to this value
Part of the task_processor name before the first '-' symbol with '-worker' appended; for example 'fs-worker' or 'main-worker'
worker_threads
threads count for the task processor
-
os-scheduling
OS scheduling mode for the task processor threads. 'idle' sets the lowest priority. 'low-priority' sets the priority below 'normal' but higher than 'idle'.
normal
spinning-iterations
tunes the number of spin-wait iterations in case of an empty task queue before threads go to sleep
1000
task-processor-queue
Task queue mode for the task processor. global-task-queue default task queue. work-stealing-task-queue experimental with potentially better scalability than global-task-queue.
global-task-queue
task-trace
optional dictionary of tracing options
empty (disabled)
task-trace.every
set N to trace each Nth task
1000
task-trace.max-context-switch-count
set upper limit of context switches to trace for a single task
1000
task-trace.logger
required name of logger to write traces to, should not be the 'default' logger
Inheritance diagram for components::ManagerControllerComponent:
