/*
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 1311392 71032 ? Ssl 2025 1599:04 node /home/sasa/dex8/dex8-panel/server/index.js sasa 1236 0.5 0.6 11820084 98316 ? Ssl 2025 2524:28 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js sasa 1257 0.3 0.4 1306724 72512 ? Ssl 2025 1618:02 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js sasa 1289 0.3 0.4 1303904 69948 ? Ssl 2025 1593:57 node /home/sasa/dex8/dex8-kiosk/server/index.js sasa 1363 4.2 3.6 12302548 601980 ? Ssl 2025 20419:49 node /home/sasa/voovuu/voovuu-pub/server/index.js sasa 1886 7.7 4.2 12350248 691160 ? Ssl 2025 36983:58 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index. sasa 1214480 0.3 0.7 22311168 123696 ? Ssl 2025 1401:32 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214483 0.3 0.4 1101824 65544 ? Ssl 2025 1288:20 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214536 0.3 0.3 1100804 64840 ? Ssl 2025 1286:36 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214544 0.3 0.3 1102056 65424 ? Ssl 2025 1297:13 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214588 0.3 0.3 1102340 64572 ? Ssl 2025 1290:41 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214617 0.3 0.4 1102464 66180 ? Ssl 2025 1286:04 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214641 0.3 0.3 1166440 63628 ? Ssl 2025 1277:33 node /home/sasa/dex8/dex8-worker/starter.js sasa 1214671 0.3 0.3 1100128 63012 ? Ssl 2025 1271:24 node /home/sasa/dex8/dex8-worker/starter.js sasa 1215731 0.9 0.7 11847236 124340 ? Ssl 2025 3508:51 node /home/sasa/dex8/dex8-api/starter.js sasa 1216489 0.3 0.4 1102072 65928 ? Ssl 2025 1286:40 node /home/sasa/dex8/dex8-worker/starter.js sasa 1399960 0.8 0.7 11828572 116504 ? Ssl Apr20 1948:47 node /home/sasa/dex8/dex8-www/server/index.js sasa 1631573 0.5 0.5 1304100 82056 ? Ssl May31 830:25 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr sasa 1824679 0.4 0.5 11798848 85052 ? Ssl Aug15 254:54 node /home/sasa/kriptus/kriptus-panel/server/index.js www-data 1898887 0.0 0.0 2608 524 ? S 01:58 0:00 sh -c ps -aux | grep node www-data 1898889 0.0 0.0 3304 712 ? S 01:58 0:00 grep node sasa 2448036 1.3 1.0 11894648 166456 ? Ssl Aug21 623:21 node /home/sasa/miko/miko-hr/server/index.js sasa 2628167 0.7 0.8 1176540 131392 ? Ssl 2025 3660:02 node /home/sasa/voovuu/voovuu-api/starter.js sasa 2663246 2.3 0.7 11847700 129352 ? Ssl Aug23 1030:16 node /home/sasa/kriptus/kriptus-api/starter.js sasa 3168557 0.6 0.6 11846636 106268 ? Ssl 2025 2834:01 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js sasa 3169051 0.5 0.5 11799488 82908 ? Ssl 2025 2335:02 node /home/sasa/@mikosoft/dodo-examples/server/index.js sasa 3264954 0.6 0.5 1332864 85344 ? Ssl Feb21 2132:24 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js sasa 3358795 0.6 0.5 1266392 88716 ? Ssl Aug29 226:52 node /home/sasa/miko/miko-hr/api/starter.js sasa 3809381 0.3 0.5 11805988 95768 ? Ssl Sep02 103:58 node /home/sasa/dex8/dex8-worker/starter.js