1.profile
profiling
levels:
0,关闭profile;1,只抓取slow查询;2,抓取所有数据。
启动profile并且设置Profile级别:
可以通过mongo shell启动,也可以通过驱动中的profile命令启动,启动后记录会被保存在system.profile collection下,可以使用db.setProfilingLevel来启动。默认slow为100 毫秒。db.setProfilingLevel可以有2个参数,第一个参数指定Profiling 级别,第二个参 数指定slow阀值。
检查当前Profiling 级别:可以通过db.getProfilingStatus()获取当前profiling级别,slowms 标记慢查询阀值。
关闭Profiling:还是使用db.setProfilingLevel(0)来关闭profiling
整个实例开启Profiling:mongod
--prifile=1 --slowms=15
shard的Profiling:对shard的profiling要对每一个实例进行profiling
查看Profiling数据
可以直接在system.profile的collection上查看如:db.systen.profile.find()。或者使用show
profile,会显示最近至少1ms时间运行的前5条记录。
Profiler概述
要修改system.profile collection的大小必须:1.关闭profiling,2.删除system.profile,3.然后重新创建system.profile,4.重启profile。
shell如下:db.setProfilingLevel(0)
,db.system.profile.drop()
,db.createCollect("system.profile",{cappedLtrue,size:4000000})
,db.setProfilingLevel(1)
2.Mongostat
mongostat n n:刷新秒数 反应当前mongod的负荷
inserts - #
of inserts per second (* means replicated
op)
query - # of
queries per
second
update - # of
updates per
second
delete - # of
deletes per second
getmore -
# of get mores (cursor batch) per
second
command - # of
commands per second, on a slave its
local|replicated
flushes - #
of fsync flushes per
second
mapped - amount
of data mmaped (total data size)
megabytes
vsize
- virtual size of process in
megabytes
res
- resident size of process in
megabytes
faults - #
of pages faults per
sec
locked - name of
and percent time for most locked database
idx
miss - percent of btree page misses
(sampled)
qr|qw
- queue lengths for clients waiting
(read|write)
ar|aw
- active clients
(read|write)
netIn
- network traffic in -
bits
netOut - network
traffic out -
bits
conn
- number of open
connections
set
- replica set
name
repl
- replication
type
PRI - primary
(master)
SEC -
secondary
REC -
recovering
UNK -
unknown
SLV -
slave
RTR - mongos process ("router")
3.Mongoop
collection级别反应,读写的时间
http://docs.mongodb.org/manual/reference/program/mongotop/
mongotop -h 192.168.10.69
2,每间隔2秒返回一次结果
ns
total
read
write
2014-05-09T14:00:55
ub1405.system.users
0ms
0ms 0ms
ub1405.system.profile
0ms
0ms 0ms
b1405.system.namespaces
0ms
0ms 0ms
ub1405.system.indexes
0ms
0ms 0ms
ub1405.WapRecommend
0ms
0ms 0ms
ub1405.VisitPageInfo
0ms
0ms 0ms
ub1405.UsageInfo
0ms
0ms 0ms
ub1405.UpgradeInfo
0ms
0ms 0ms
ub1405.Switch
0ms
0ms 0ms
4.mongoperf
用来测试io性能,可以用来做mongo的io压力测试,和sql
server的SQLIOSim
http://docs.mongodb.org/manual/reference/program/mongoperf/
5. ServerStatus db.serverStatus()
包含了很多信息
6.db.stats()
反应数据库所占用的存储
{
"db" : "ub1405",
"collections" : 17,
"objects" : 9939344,
"avgObjSize" :
336.2453477815035,
"dataSize" : 3342058180,
"storageSize" : 4501643264,
"numExtents" : 111,
"indexes" : 15,
"indexSize"
: 322633136,
"fileSize" :
8519680000,
"nsSizeMB" :
16,
"dataFileVersion" :
{
"major" : 4,
"minor" : 5
},
"ok" : 1
}
7.db.collection.stats()
返回collection的一些信息:
{
"ns" :
"ub1405.WapRecommend",
"count" : 514,
"size" :
174416,
"avgObjSize" :
339.3307392996109,
"storageSize" : 430080,
"numExtents" : 3,
"nindexes"
: 1,
"lastExtentSize" :
327680,
"paddingFactor" :
1,
"systemFlags" : 1,
"userFlags" : 0,
"totalIndexSize" : 24528,
"indexSizes" : {
"_id_" : 24528
},
"ok" : 1
}