Autohost Memwatch
An API for collecting and reporting memory usage for the purpose of detecting and tracking down memory leaks in Node services. Uses memwatch-next.
API
Status
Request
GET /ah/memoryProfile/status
Response
{
"lastEvent": "",
"lastGC": {
"timestamp": "",
"num_full_gc": 17,
"num_inc_gc": 8,
"heap_compactions": 8,
"estimated_base": 2592568,
"current_base": 2592568,
"min": 2499912,
"max": 2592568,
"usage_trend": 0
},
"lastLeak": {
"timestamp": "",
"start": "Fri, 29 Jun 2012 14:12:13 GMT",
"end": "Fri, 29 Jun 2012 14:12:33 GMT",
"growth": 67984,
"reason": "heap growth over 5 consecutive GCs (20s) - 11.67 mb/hr"
},
"lastDiff": {
"timestamp": "",
"before": { "nodes": 11625, "size_bytes": 1869904, "size": "1.78 mb" },
"after": { "nodes": 21435, "size_bytes": 2119136, "size": "2.02 mb" },
"change": { "size_bytes": 249232, "size": "243.39 kb", "freed_nodes": 197,
"allocated_nodes": 10007,
"details": [
{ "what": "String",
"size_bytes": -2120, "size": "-2.07 kb", "+": 3, "-": 62
},
{ "what": "Array",
"size_bytes": 66687, "size": "65.13 kb", "+": 4, "-": 78
}
]
}
}
}Details
Request
GET /ah/memoryProfile/:profile
Response
{
"lastEvent": "",
"lastGC": {
"timestamp": "",
"num_full_gc": 17,
"num_inc_gc": 8,
"heap_compactions": 8,
"estimated_base": 2592568,
"current_base": 2592568,
"min": 2499912,
"max": 2592568,
"usage_trend": 0
},
"lastLeak": {
"timestamp": "",
"start": "Fri, 29 Jun 2012 14:12:13 GMT",
"end": "Fri, 29 Jun 2012 14:12:33 GMT",
"growth": 67984,
"reason": "heap growth over 5 consecutive GCs (20s) - 11.67 mb/hr"
},
"lastDiff": {
"timestamp": "",
"before": { "nodes": 11625, "size_bytes": 1869904, "size": "1.78 mb" },
"after": { "nodes": 21435, "size_bytes": 2119136, "size": "2.02 mb" },
"change": { "size_bytes": 249232, "size": "243.39 kb", "freed_nodes": 197,
"allocated_nodes": 10007,
"details": [
{ "what": "String",
"size_bytes": -2120, "size": "-2.07 kb", "+": 3, "-": 62
},
{ "what": "Array",
"size_bytes": 66687, "size": "65.13 kb", "+": 4, "-": 78
}
]
}
}
}List
Including a ?details=true parameter will cause the list to include the detail for each profile captured instead of only providing the ids.
Request
GET /ah/memory
Response
{
"memoryProfiles": []
}Delete
Request
DELETE /ah/memoryProfile/:profile
Response
{
"message": "Deleted profile :profile"
}