/*
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 1208 0.3 0.4 1307040 68144 ? Ssl 2025 1625:42 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.5 11821376 94304 ? Ssl 2025 2566:35 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1307912 68256 ? Ssl 2025 1645:30 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.3 1301856 64364 ? Ssl 2025 1620:27 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.4 12296092 565656 ? Ssl 2025 20773:26 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.8 4.2 12358624 695380 ? Ssl 2025 38319:51 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 118660 ? Ssl 2025 1431:00 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.3 1101824 59520 ? Ssl 2025 1316:34 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.3 1100804 59588 ? Ssl 2025 1314:47 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.3 1102568 61220 ? Ssl 2025 1325:43 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102340 60084 ? Ssl 2025 1319:03 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.3 1102208 61028 ? Ssl 2025 1314:17 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1166184 58764 ? Ssl 2025 1305:48 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100128 57784 ? Ssl 2025 1299:29 node /home/sasa/dex8/dex8-worker/starter.js sasa 1216489 0.3 0.3 1102840 60712 ? Ssl 2025 1314:59 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11826540 117560 ? Ssl Apr20 2029:17 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.5 0.4 1304104 76128 ? Ssl May31 975:02 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.4 11798848 79308 ? Ssl Aug15 295:10 node /home/sasa/kriptus/kriptus-panel/server/index.js sasa 2072475 0.7 0.6 1156844 105468 ? Ssl Sep24 46:24 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2075109 14.2 0.6 11708140 111560 ? Ssl Sep24 862:40 node /home/sasa/dex8/dex8-api/starter.js sasa 2075416 0.6 0.4 1332016 79724 ? Ssl Sep24 37:23 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 2448036 1.2 1.0 11909832 177536 ? Ssl Aug21 709:12 node /home/sasa/miko/miko-hr/server/index.js www-data 2610090 0.0 0.0 2608 592 ? S 00:41 0:00 sh -c ps -aux | grep node www-data 2610092 0.0 0.0 3304 716 ? S 00:41 0:00 grep node sasa 2663246 2.2 0.7 11853212 127872 ? Ssl Aug23 1201:33 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.6 11830204 100368 ? Ssl 2025 2903:37 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.4 11799488 77632 ? Ssl 2025 2378:09 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3358795 0.6 0.5 1266904 84252 ? Ssl Aug29 283:57 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.5 22297288 97452 ? Rsl Sep02 134:36 node /home/sasa/dex8/dex8-worker/starter.js