cpu_used

CPUs

The total amount of CPUs used

cpu_util

percent

The average CPU utilization % across all the CPUs (i.e., how much time on average the CPUs are busy doing work)

memory_used

bytes

The total amount of memory used

memory_util

percent

The average memory utilization %

nodejs_gc_heap_used

bytes

GC heap used

nodejs_rss

bytes

Process Resident Set Size (RSS)

nodejs_v8_heap_total

bytes

V8 heap total

nodejs_v8_heap_used

bytes

V8 heap used

nodejs_number_active_threads

threads

Number of active threads

nodejs_suspension_time

percent

Suspension time %

nodejs_active_handles

handles

Number of active libuv handles grouped by handle type. Every handle type is C++ class name

nodejs_active_handles_total

handles

Total number of active handles

nodejs_active_requests

requests

Number of active libuv requests grouped by request type. Every request type is C++ class name

nodejs_active_requests_total

requests

Total number of active requests

nodejs_eventloop_lag_max_seconds

seconds

The maximum recorded event loop delay

nodejs_eventloop_lag_mean_seconds

seconds

The mean of the recorded event loop delays

nodejs_eventloop_lag_min_seconds

seconds

The minimum recorded event loop delay

nodejs_eventloop_lag_p50_seconds

seconds

The 50th percentile of the recorded event loop delays

nodejs_eventloop_lag_p90_seconds

seconds

The 90th percentile of the recorded event loop delays

nodejs_eventloop_lag_p99_seconds

seconds

The 99th percentile of the recorded event loop delays

nodejs_eventloop_lag_seconds

seconds

Lag of event loop in seconds

nodejs_external_memory_bytes

bytes

NodeJS external memory size in bytes

nodejs_gc_duration_seconds_bucket

seconds

The total count of observations for a bucket in the histogram. Garbage collection duration by kind, one of major, minor, incremental or weakcb

nodejs_gc_duration_seconds_count

seconds

The total number of observations for Garbage collection duration by kind, one of major, minor, incremental or weakcb

nodejs_gc_duration_seconds_sum

seconds

The total sum of observations for Garbage collection duration by kind, one of major, minor, incremental or weakcb

nodejs_heap_size_total_bytes

bytes

Process heap size from NodeJS in bytes

nodejs_heap_size_used_bytes

bytes

Process heap size used from NodeJS in bytes

nodejs_heap_space_size_available_bytes

bytes

Process heap size available from NodeJS in bytes

nodejs_heap_space_size_total_bytes

bytes

Process heap space size total from NodeJS in bytes

nodejs_heap_space_size_used_bytes

bytes

Process heap space size used from NodeJS in bytes

process_cpu_seconds_total

seconds

Total user and system CPU time spent in seconds

process_cpu_system_seconds_total

seconds

Total system CPU time spent in seconds

process_cpu_user_seconds_total

seconds

Total user CPU time spent in seconds

process_heap_bytes

bytes

Process heap size in bytes

process_max_fds

fds

Maximum number of open file descriptors

process_open_fds

fds

Number of open file descriptors

process_resident_memory_bytes

bytes

Resident memory size in bytes

process_virtual_memory_bytes

bytes

Virtual memory size in bytes

v8_allocation_size_pretenuring

categorical

--allocation-site-pretenuring

--allocation-site-pretenuring, --no-allocation-site-pretenuring

yes

Pretenure with allocation sites

v8_min_semi_space_size

integer

megabytes

0

0 → 1048576

yes

Min size of a semi-space (in MBytes), the new space consists of two semi-spaces

v8_max_semi_space_size

integer

megabytes

0

0 → 1048576

yes

Max size of a semi-space (in MBytes), the new space consists of two semi-spaces. This parameter is equivalent to v8_max_semi_space_size_ordinal.

v8_max_semi_space_size_ordinal

ordinal

megabytes

16

2, 4, 6, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768

yes

Max size of a semi-space (in MBytes), the new space consists of two semi-spaces. This parameter is equivalent to v8_max_semi_space_size but forces power of 2 values.

v8_semi_space_grouth_factor

integer

2

0 → 100

yes

Factor by which to grow the new space

v8_max_old_space_size

integer

megabytes

0

0 → 1048576

yes

Max size of the old space (in Mbytes)

v8_max_heap_size

integer

megabytes

0

0 → 1048576

yes

Max size of the heap (in Mbytes) both max_semi_space_size and max_old_space_size take precedence. All three flags cannot be specified at the same time.

v8_initial_heap_size

integer

megabytes

0

0 → 1048576

yes

Initial size of the heap (in Mbytes)

v8_initial_old_space_size

integer

megabytes

0

0 → 1048576

yes

Initial old space size (in Mbytes)

v8_parallel_scavenge

categorical

--parallel-scavenge

--parallel-scavenge, --no-parallel-scavenge

yes

Parallel scavenge

v8_scavenge_task_trigger

integer

80

1 → 100

yes

Scavenge task trigger in percent of the current heap limit

v8_scavenge_separate_stack_scanning

categorical

--no-scavenge-separate-stack-scanning

--scavenge-separate-stack-scanning, --no-scavenge-separate-stack-scanning

yes

Use a separate phase for stack scanning in scavenge

v8_concurrent_marking

categorical

--concurrent-marking

--concurrent-marking, --no-concurrent-marking

yes

Use concurrent marking

v8_parallel_marking

categorical

--parallel-marking

--parallel-marking, --no-parallel-marking

yes

Use parallel marking in atomic pause

v8_concurrent_sweeping

categorical

--concurrent-sweeping

--concurrent-sweeping, --no-concurrent-sweeping

yes

Use concurrent sweeping

v8_heap_growing_percent

integer

0

0 → 99

yes

Specifies heap growing factor as (1 + heap_growing_percent/100)

v8_os_page_size

integer

kilobytes

0

0 → 1048576

yes

Override OS page size (in KBytes)

v8_stack_size

integer

kilobytes

984

16 → 1048576

yes

Default size of stack region v8 is allowed to use (in kBytes)

v8_single_threaded

categorical

--no-single-threaded

--single-threaded, --no-single-threaded

yes

Disable the use of background tasks

v8_single_threaded_gc

categorical

--no-single-threaded-gc

--single-threaded-gc, --no-single-threaded-gc

yes

Disable the use of background gc tasks

Node JS 18

Node JS 18 runtime