YurgenUA

export GODEBUG="gctrace=1"
export GOGC="off"
export GOMEMLIMIT="5000MiB"
./http-server

YurgenUA

     _alloc_MiB.....................: avg=3061.502589  min=104.566597  med=3154.655563  max=9966.452698  p(90)=4578.318161  p(95)=4781.693681 
     _num_GC........................: 47            min=2           max=47           
     _sys_MiB.......................: avg=10006.359093 min=6053.920395 med=10010.259232 max=10010.509232 p(90)=10010.509232 p(95)=10010.509232
     _totalAlloc_MiB................: 102014.031433 min=6102.634956 max=102014.031433
     http_reqs......................: 2006          62.543244/s
     
     _alloc_MiB.....................: avg=3232.567927 min=103.517273  med=3459.199432 max=7017.776573 p(90)=4476.43439  p(95)=4781.083931
     _num_GC........................: 43          min=4           max=43         
     _sys_MiB.......................: avg=7095.266705 min=7094.967514 med=7095.217514 max=7095.467514 p(90)=7095.467514 p(95)=7095.467514
     _totalAlloc_MiB................: 119405.9104 min=7119.484787 max=119405.9104

YurgenUA

     _alloc_MiB.....................: avg=1420.726537 min=306.908646  med=1426.640709 max=3154.172638 p(90)=1934.265559 p(95)=2238.701762
     _num_GC........................: 127           min=2           max=127          
     _sys_MiB.......................: avg=3660.186191 min=3243.290817 med=3555.933487 max=4492.849716 p(90)=4492.849716 p(95)=4492.849716
     _totalAlloc_MiB................: 111173.459229 min=3153.929672 max=111173.459229
     http_reqs......................: 2186          69.116249/s
     
     _alloc_MiB.....................: avg=1462.192028  min=1.993828    med=1324.787132  max=9864.794876  p(90)=1934.006889  p(95)=2137.377972 
     _num_GC........................: 114          min=10          max=114         
     _sys_MiB.......................: avg=10112.061536 min=7615.991074 med=10114.640121 max=10114.640121 p(90)=10114.640121 p(95)=10114.640121
     _totalAlloc_MiB................: 98560.178452 min=7627.846252 max=98560.178452

YurgenUA

export GODEBUG="gctrace=1"
export GOGC="off"
export GOMEMLIMIT="2000MiB"
./http-server

YurgenUA

     _alloc_MiB.....................: avg=26886.056441 min=10169.836845 med=26850.120247 max=43733.548073 p(90)=43732.736609 p(95)=43733.130183
     _num_GC........................: 0            min=0            max=0           
     _sys_MiB.......................: avg=26972.922037 min=10218.146011 med=26979.289642 max=43845.564163 p(90)=43845.564163 p(95)=43845.564163
     _totalAlloc_MiB................: 43733.548073 min=10169.836845 max=43733.548073
     http_reqs......................: 860          25.321205/s
     
     _alloc_MiB.....................: avg=29083.303195 min=10169.82753  med=25427.068947 max=48106.815369 p(90)=48105.904208 p(95)=48106.331332
     _num_GC........................: 0            min=0           max=0           
     _sys_MiB.......................: avg=29164.89418  min=10218.146011 med=25522.034409 max=48218.26442  p(90)=48218.26442  p(95)=48218.26442 
     _totalAlloc_MiB................: 48106.815369 min=10169.82753 max=48106.815369

YurgenUA

export GODEBUG="gctrace=1"
export GOGC="off"
./http-server

YurgenUA

function fetchMemMetrics() {
  let response = http.get('http://localhost:8080/debug/vars');
  let debugVarsResponse = JSON.parse(response.body);
  return {
    alloc : debugVarsResponse.memstats.Alloc / (1024 * 1024),
    totalAlloc : debugVarsResponse.memstats.TotalAlloc / (1024 * 1024),
    sys : debugVarsResponse.memstats.Sys / (1024 * 1024),
    numGC: debugVarsResponse.memstats.NumGC
  };
}

YurgenUA

export default function() {
  http.get('http://localhost:8080/hash');

  // Fetch memory footprint value once per second
  let memory = fetchMemMetrics();
  
  allocMiBMetric.add(memory.alloc);
  totalAllocMiBMetric.add(memory.totalAlloc);
  sysMiBMetric.add(memory.sys);
  numGCMetric.add(memory.numGC);

YurgenUA

export const options = {
  vus: 100,
  duration: '30s',
};

YurgenUA

import _ "expvar"