/* This example shows synchronous execution, blocking code. console.log(contents); blocks process and that's why console.log('Do something else!'); must wait Max file that didn't crash nodeJS had 350MB */ //load modules var fs = require('fs'); //synchronous file reading var content = fs.readFile('./testfiles/largefile350mb.txt', 'utf8'); console.log(content); //returns 'undefined' because readFile requires callback and dont return any value //here process is blocked while file is not read completely. After that next console.log(); continue console.log('Do something else!'); /* Conclusion: Due to asynchronous execution, first is file dumped then appear 'Do something else'. That's because console.log('Do something else!'); waits fs.readFileSync('largefile350mb.txt', 'utf8'); to be finished. */
$ps -aux | grep node (list all node processes) sasa 914 0.5 0.5 1307544 85768 ? Ssl Aug04 316:11 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 935 0.7 0.8 11786840 132404 ? Ssl Aug04 467:30 node /home/sasa/dex8/dex8-api/starter.js sasa 938 0.4 0.4 1307036 76464 ? Ssl Aug04 266:37 node /home/sasa/regoch/regoch-www/server sasa 945 0.3 0.4 1303752 70980 ? Ssl Aug04 228:44 node /home/sasa/dex8/dex8-panel/server/index.js sasa 947 0.7 0.7 11853768 116676 ? Ssl Aug04 467:56 node /home/sasa/dex8/dex8-www/server/index.js sasa 966 0.5 0.5 11808976 97724 ? Ssl Aug04 351:58 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 980 0.7 0.5 1330216 83088 ? Ssl Aug04 480:21 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 997 0.3 0.4 1303104 71576 ? Ssl Aug04 231:02 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1021 0.3 0.4 1297920 66128 ? Ssl Aug04 227:48 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1065 0.6 0.6 11825000 100048 ? Ssl Aug04 388:54 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 1074 0.6 0.6 1149316 103688 ? Ssl Aug04 378:29 node /home/sasa/voovuu/voovuu-api/starter.js sasa 1136 0.7 0.9 11861572 157324 ? Ssl Aug04 440:29 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1148 0.4 0.4 11794644 78220 ? Ssl Aug04 252:07 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 1197 0.3 0.4 1102188 66128 ? Ssl Aug04 235:28 node /home/sasa/dex8/dex8-worker/starter.js sasa 1199 0.3 0.4 22277756 77388 ? Ssl Aug04 238:57 node /home/sasa/dex8/dex8-worker/starter.js sasa 1308 0.3 0.3 1101664 65280 ? Ssl Aug04 234:47 node /home/sasa/dex8/dex8-worker/starter.js sasa 1325 0.3 0.3 1101408 65492 ? Ssl Aug04 234:40 node /home/sasa/dex8/dex8-worker/starter.js sasa 1393 0.7 0.8 22324196 143788 ? Ssl Aug04 481:39 node /home/sasa/dex8/dex8-worker/starter.js sasa 1395 0.3 0.3 1101676 65512 ? Ssl Aug04 235:45 node /home/sasa/dex8/dex8-worker/starter.js sasa 1489 0.3 0.3 1101408 64724 ? Ssl Aug04 235:42 node /home/sasa/dex8/dex8-worker/starter.js sasa 1496 0.3 0.4 1102432 67268 ? Ssl Aug04 234:28 node /home/sasa/dex8/dex8-worker/starter.js sasa 1607 0.3 0.3 1101408 65268 ? Ssl Aug04 235:02 node /home/sasa/dex8/dex8-worker/starter.js sasa 1608 0.3 0.3 1101920 65244 ? Ssl Aug04 233:53 node /home/sasa/dex8/dex8-worker/starter.js sasa 1686 1.1 0.9 11847744 148728 ? Ssl Aug04 699:24 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. www-data 643350 0.0 0.0 2608 592 ? S 00:26 0:00 sh -c ps -aux | grep node www-data 643352 0.0 0.0 3304 720 ? S 00:26 0:00 grep node sasa 1371685 0.4 0.5 11803816 90656 ? Ssl Aug16 189:09 node /home/sasa/mikosoft-info/solar-wind-energy/server/index.js sasa 1460918 0.4 0.3 1300136 65248 ? Ssl Aug17 186:51 node /home/sasa/sites-nodejs/oxygen-free-copper/server.js