Hello faced such a problem as N8N’s long answer. The Waiting (TTFB) parameter is very large. However, it is stable. You always have to wait 1.4-1.5 seconds to start getting the first results. This happens with different workflows. When accessing direct and via reverse proxy nginx. Whatever we do, the response time remains unchanged. This is a problem, since, for example, a telegram bot reacts to a chat response for a long time, 1.5 seconds of waiting is added to each task execution.
Tell me what we can check or what can we fix to improve the situation?
Server VPS 2 core, 2Gb RAM, 32 GB SSD. The change in resources, both up and down, did not affect in any way.
Debian 10
n8n 0.86.1
nodejs v14.15.4
n8n is installed via npm install n8n -g
Here’s an example of a simple 3-node workflow. And the time taken to open the page. At the same time, in the n8n itself in history, it indicates that the execution was fast enough.
{
"nodes": [
{
"parameters": {},
"name": "Start",
"type": "n8n-nodes-base.start",
"typeVersion": 1,
"position": [
250,
300
]
},
{
"parameters": {
"path": "meshurlget",
"responseMode": "lastNode",
"options": {
"responseContentType": "text/html; charset=utf-8",
"responsePropertyName": "response",
"rawBody": true
}
},
"name": "Webhook",
"type": "n8n-nodes-base.webhook",
"typeVersion": 1,
"position": [
450,
300
],
"webhookId": "bb24be26-f342-4b5f-918d-01689422432e"
},
{
"parameters": {
"functionCode": "item.nodeid = $node[\"Webhook\"].json[\"query\"][\"param\"].substr(6);\nreturn item;\n"
},
"name": "FunctionItem",
"type": "n8n-nodes-base.functionItem",
"typeVersion": 1,
"position": [
650,
300
],
"notesInFlow": true,
"notes": "Обрезаем лишнее"
},
{
"parameters": {
"values": {
"string": [
{
"name": "response",
"value": "=<head>\n</head>\n<body>\n<h1>Ссылка для доступа к рабочему столу</h1>\n<p>https://rm.realsd.ru/webhook/mesh?tab=desktop&nodeid={{$node[\"FunctionItem\"].json[\"nodeid\"]}}</p>\n<h1>Ссылка для доступа к терминалу</h1>\n<p>https://rm.realsd.ru/webhook/mesh?tab=terminal&nodeid={{$node[\"FunctionItem\"].json[\"nodeid\"]}}</p>\n<h1>Ссылка для доступа к файлам</h1>\n<p>https://rm.realsd.ru/webhook/mesh?tab=file&nodeid={{$node[\"FunctionItem\"].json[\"nodeid\"]}}</p>\n<h1>Общая ссылка доступа</h1>\n<p>https://rm.realsd.ru/webhook/mesh?nodeid={{$node[\"FunctionItem\"].json[\"nodeid\"]}}</p>\n</body>"
}
]
},
"options": {}
},
"name": "Set",
"type": "n8n-nodes-base.set",
"typeVersion": 1,
"position": [
850,
300
]
}
],
"connections": {
"Webhook": {
"main": [
[
{
"node": "FunctionItem",
"type": "main",
"index": 0
}
]
]
},
"FunctionItem": {
"main": [
[
{
"node": "Set",
"type": "main",
"index": 0
}
]
]
}
}
}