Created
December 26, 2013 11:37
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This script simplify some profiling tasks in MongoDB. Import it on startup:
$ mongo [db_name] --shell profile.js
Usage:
> profile_hist()
> profile_ns()
> profile_op() Links to original posts in my blog about profiling in MongoDB [1](http://amezhenin.ru/mongodb/mongodb-profiling-part-1.html) and [2](http://amezhenin.ru/mongodb/mongodb-profiling-p…
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function profile_hist(){ | |
res = db.system.profile.aggregate([{$project: {'ms':{'$subtract':['$millis',{$mod:['$millis', 50]}]}}}, {$group:{_id:'$ms', sum:{$sum:1}}}, {$sort:{_id:1}}]); | |
res['result'].forEach(function(i) { print(i['_id'], '\t',i['sum']); }); | |
} | |
function profile_ns(){ | |
res = db.system.profile.aggregate([{$group:{_id:'$ns', count:{$sum:1}, avg_ms:{$avg:'$millis'}, min_ms:{$min:'$millis'}, max_ms:{$max:'$millis'}}}]) | |
print('ns min_ms max_ms avg_ms count total_ms') | |
res['result'].forEach(function(i) { | |
ns = i['_id'].substr(0,17); | |
ns = ns + Array(20 - ns.length+1).join(" ") | |
print(ns,i['min_ms'],'\t\t',i['max_ms'],'\t\t',Math.round(i['avg_ms']),'\t\t',i['count'],'\t\t',Math.round(i['count']*i['avg_ms'])); }); | |
} | |
function profile_op(){ | |
res = db.system.profile.aggregate([{$group:{_id:'$op', count:{$sum:1}, avg_ms:{$avg:'$millis'}, min_ms:{$min:'$millis'}, max_ms:{$max:'$millis'}}}]) | |
print('op min_ms max_ms avg_ms count total_ms') | |
res['result'].forEach(function(i) { | |
ns = i['_id'].substr(0,17); | |
ns = ns + Array(20 - ns.length+1).join(" ") | |
print(ns,i['min_ms'],'\t\t',i['max_ms'],'\t\t',Math.round(i['avg_ms']),'\t\t',i['count'],'\t\t',Math.round(i['count']*i['avg_ms'])); }); | |
} |
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