1亿条记录的MongoDB数据库随机查询性能测试

数据库 2024/11/16 佚名

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mongdb性能压力测试，随机查询，数据量1亿条记录

操作系统centos6.4x64位

从测试结果看，当mongodb将数据全部载入到内存后，查询速度根据文档的大小，性能瓶颈通常会是在网络流量和CPU的处理性能（该次测试中当数据全部在内存后，纯粹的查询速度可以稳定在10W/S左右，系统load可以维持在1以下，由于此时CPU已经被使用到极限了，当并发再大时load值会直线飙升，性能急剧下降）。

压力生成服务器与Mongodb服务器基本配置

cpu型号：Intel(R) Xeon(R) CPU E5-2630 0 @ 2.30GHz

内存：64G

硬盘：10K转速 6块做RAID0，raid卡cache 1G（磁盘的IO性能决定MONGODB将非热点数据载入到内存的速度，当热点数据全部在内存后，IO性能可以忽略）

网卡速度：接入千兆交互机，速度1000MB

数据结构，user_id为索引键值为0-99999999，数据总大小约37G左右，全部载入内存后约32G

> db.thing.findOne();

{

"_id" : ObjectId("51fd6830c6db9d15676f89ef"),

"ip" : "192.168.168.254",

"g_roup" : "kiwi",

"mac" : "of:fd:67:8c:2f:8f",

"address" : "hongmei1801num",

"user_id" : 10000000,

"name" : "user10000000",

"title" : "system",

"database" : "mongodb",

"telphone" : NumberLong("15718441234"),

"mail" : "yj@chinapnr.com",

"os" : "win7",

"company" : "chinapnr"

}

压力生成脚本开启40个进程，并发随机查询

[root@mdb-166 app]# cat mselectmongodb.py

import time,pymongo,multiprocessing,random,string

class SqlToMongo:

def m_sql(self,x,y):

server="mongodb://python:oracle@192.168.4.167:27017/syslog"

conn=pymongo.Connection(server)

db=conn.syslog

col=db.thing

start=x*y

end=start+x

for i in xrange(start,end):

d=random.randint(start,end)

val=col.find({"user_id":d})

a=list(val)

def gen_load(x,taskid):

task=SqlToMongo()

print "task %s start!" % taskid

task.m_sql(x,taskid)

if __name__ == "__main__":

inser_number=2500000

pro_pool = multiprocessing.Pool(processes=101)

print time.strftime('%Y-%m-%d:%H-%M-%S',time.localtime(time.time()))

start_time=time.time()

manager = multiprocessing.Manager()

for i in xrange(40):

taskid=i

pro_pool.apply_async(gen_load,args=(inser_number,taskid))

pro_pool.close()

pro_pool.join()

elapsed = time.time()-start_time

print elapsed

time.sleep(1)

print "Sub-process(es) done."

压力生成服务器负载，同时开启80个并发时抗不住了

top - 17:12:59 up 2 days, 7:34, 4 users, load average: 35.87, 29.41, 18.16

Tasks: 487 total, 64 running, 423 sleeping, 0 stopped, 0 zombie

Cpu0 : 88.1%us, 10.6%sy, 0.0%ni, 1.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu1 : 87.7%us, 10.9%sy, 0.0%ni, 1.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu2 : 87.7%us, 11.0%sy, 0.0%ni, 1.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu3 : 88.0%us, 10.3%sy, 0.0%ni, 1.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu4 : 87.7%us, 11.0%sy, 0.0%ni, 1.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu5 : 88.7%us, 9.9%sy, 0.0%ni, 1.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu6 : 40.2%us, 3.3%sy, 0.0%ni, 0.3%id, 0.0%wa, 0.0%hi, 56.1%si, 0.0%st

Cpu7 : 89.7%us, 8.9%sy, 0.0%ni, 1.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu8 : 88.1%us, 10.6%sy, 0.0%ni, 1.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu9 : 89.7%us, 9.3%sy, 0.0%ni, 1.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu10 : 88.7%us, 9.9%sy, 0.0%ni, 1.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu11 : 88.4%us, 10.2%sy, 0.0%ni, 1.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Mem: 65909128k total, 5409148k used, 60499980k free, 90680k buffers

Swap: 8388600k total, 0k used, 8388600k free, 4392420k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND

13342 root 20 0 178m 9056 1480 R 15.9 0.0 5:15.79 python mselectmongodb.py

13430 root 20 0 178m 8976 1468 R 15.9 0.0 3:05.26 python mselectmongodb.py

13321 root 20 0 178m 9000 1464 R 15.6 0.0 5:17.26 python mselectmongodb.py

........

13311 root 20 0 178m 8980 1464 R 14.9 0.0 5:21.70 python mselectmongodb.py

系统负载，

[root@mdb-167 ~]# top

并发进程80的系统负载

[root@mdb-167 ~]# top

top - 17:08:33 up 4:49, 5 users, load average: 0.00, 0.00, 1.05

Tasks: 287 total, 2 running, 285 sleeping, 0 stopped, 0 zombie

Cpu0 : 60.1%us, 31.4%sy, 0.0%ni, 8.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu1 : 57.8%us, 33.0%sy, 0.0%ni, 9.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu2 : 58.4%us, 31.4%sy, 0.0%ni, 10.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu3 : 54.8%us, 33.9%sy, 0.0%ni, 11.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu4 : 55.8%us, 31.8%sy, 0.0%ni, 12.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu5 : 53.4%us, 32.9%sy, 0.0%ni, 13.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu6 : 31.4%us, 12.7%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 55.9%si, 0.0%st

Cpu7 : 61.0%us, 31.7%sy, 0.0%ni, 7.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu8 : 59.7%us, 32.3%sy, 0.0%ni, 8.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu9 : 59.0%us, 32.4%sy, 0.0%ni, 8.6%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu10 : 59.4%us, 31.4%sy, 0.0%ni, 9.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu11 : 57.8%us, 32.1%sy, 0.0%ni, 10.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Mem: 65909128k total, 34281160k used, 31627968k free, 50416k buffers

Swap: 8388600k total, 0k used, 8388600k free, 33502796k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND

2924 mdb 20 0 80.7g 31g 31g S 1092.6 50.7 458:42.39 /app/mongodb/bin/mongod -f /app/mongodb/etc/mdb.conf

1967 root 20 0 0 0 0 S 0.3 0.0 0:05.40 [kondemand/6]

1996 root 20 0 10964 720 432 S 0.3 0.0 0:05.12 irqbalance

3045 mdb 20 0 84500 38m 7076 S 0.3 0.1 0:01.99 mongostat -h 127.0.0.1 --port 27017 -u root -p xxxxx

mongstat监控

insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time

*0 92408 *0 *0 0 1|0 0 40.1g 80.7g 31.9g 0 syslog:0.0% 0 0|0 20|0 5m 28m 82 17:08:32

*0 92827 *0 *0 0 3|0 0 40.1g 80.7g 31.9g 0 syslog:0.0% 0 0|0 19|0 5m 28m 82 17:08:33

.......

*0 93717 *0 *0 0 1|0 0 40.1g 80.7g 31.9g 0 syslog:0.0% 0 0|0 25|0 5m 28m 82 17:08:38

*0 92193 *0 *0 0 3|0 0 40.1g 80.7g 31.9g 0 syslog:0.1% 0 1|0 11|0 5m 28m 82 17:08:39

*0 92250 *0 *0 0 1|0 0 40.1g 80.7g 31.9g 0 syslog:0.0% 0 0|0 25|0 5m 28m 82 17:08:40

*0 93790 *0 *0 0 3|0 0 40.1g 80.7g 31.9g 0 syslog:0.0% 0 1|0 16|0 5m 28m 82 17:08:41

网络流量

[root@mdb-167 app]# ./check_netflow.py -l 1 -i p1p1 -t 1

IN 1 seconds network transmit and receive average(KB)

transmit=34101,receive=11370

transmit=34354,receive=11452

.....

transmit=33957,receive=11322

transmit=34045,receive=11353

transmit=34244,receive=11416

磁盘IO

[root@mdb-167 ~]# tail -f mselectmongodb

Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util

sda 0.00 7.00 0.00 4.00 0.00 48.00 24.00 0.00 0.00 0.00 0.00

Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util

sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

.....

sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util

sda 0.00 7.00 0.00 5.00 0.00 48.00 19.20 0.00 0.00 0.00 0.00

二、并发进程达到120的时候系统负载（由于CPU的处理能力，系统已经无法承受）

top - 16:57:57 up 3:47, 5 users, load average: 58.18, 30.82, 16.40

Tasks: 288 total, 1 running, 287 sleeping, 0 stopped, 0 zombie

Cpu0 : 59.6%us, 40.2%sy, 0.0%ni, 0.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu1 : 59.3%us, 40.5%sy, 0.0%ni, 0.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu2 : 59.0%us, 40.8%sy, 0.0%ni, 0.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu3 : 58.7%us, 41.0%sy, 0.0%ni, 0.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu4 : 58.8%us, 40.9%sy, 0.0%ni, 0.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu5 : 58.8%us, 40.9%sy, 0.0%ni, 0.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu6 : 27.2%us, 13.1%sy, 0.0%ni, 0.1%id, 0.0%wa, 0.0%hi, 59.6%si, 0.0%st

Cpu7 : 60.5%us, 39.3%sy, 0.0%ni, 0.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu8 : 60.2%us, 39.5%sy, 0.0%ni, 0.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu9 : 59.8%us, 39.9%sy, 0.0%ni, 0.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu10 : 59.5%us, 40.2%sy, 0.0%ni, 0.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Cpu11 : 59.4%us, 40.4%sy, 0.0%ni, 0.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st

Mem: 65909128k total, 34278248k used, 31630880k free, 45652k buffers

Swap: 8388600k total, 0k used, 8388600k free, 33501056k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND

2924 mdb 20 0 80.7g 31g 31g S 1193.2 50.4 165:06.51 /app/mongodb/bin/mongod -f /app/mongodb/etc/mdb.conf

mongstat监控

insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time

*0 103334 *0 *0 0 1|0 0 40.1g 80.7g 31.7g 0 syslog:0.1% 0 0|0 56|0 6m 31m 122 16:55:19

*0 103299 *0 *0 0 3|0 0 40.1g 80.7g 31.7g 0 syslog:0.0% 0 0|0 55|0 6m 31m 122 16:55:20

......

*0 102858 *0 *0 0 3|0 0 40.1g 80.7g 31.7g 0 syslog:0.0% 0 0|0 66|0 6m 31m 122 16:55:26

*0 103201 *0 *0 0 1|0 0 40.1g 80.7g 31.7g 0 syslog:0.0% 0 0|0 60|0 6m 31m 122 16:55:27

*0 102381 *0 *0 0 3|0 0 40.1g 80.7g 31.7g 0 syslog:0.1% 0 1|0 89|0 6m 31m 122 16:55:28

磁盘IO

[root@mdb-167 ~]# tail -f mselectmongodb

Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util

sda 0.00 7.00 0.00 4.00 0.00 48.00 24.00 0.00 0.00 0.00 0.00

Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util

.....

Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util

sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util

sda 0.00 7.00 0.00 5.00 0.00 48.00 19.20 0.00 0.00 0.00 0.00

网络流量

transmit=37567,receive=12525

......

transmit=37691,receive=12568

transmit=37592,receive=12534

transmit=37480,receive=12498

以下是mongodb从测试开始时的查询速度变化过程，当数据逐步载入内存后，查询速度也在逐步提高，大约会花费了20分钟将所有数据载入到了内存。

[mdb@mdb-167 ~]$ more mselectmongodb

connected to: 127.0.0.1:27017

insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time

*0 679 *0 *0 0 1|0 0 40.1g 80.6g 494m 671 syslog:1.0% 0 0|0 0|0 40k 213k 42 16:37:16

*0 562 *0 *0 0 3|0 0 40.1g 80.6g 500m 625 syslog:0.9% 0 36|0 2|0 33k 176k 42 16:37:17

..........

*0 626 *0 *0 0 1|0 0 40.1g 80.6g 550m 667 syslog:1.0% 0 36|0 1|0 36k 196k 42 16:37:24

*0 649 *0 *0 0 3|0 1 40.1g 80.6g 557m 671 syslog:0.9% 0 35|0 1|0 38k 202k 42 16:37:25

insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time

*0 706 *0 *0 0 1|0 0 40.1g 80.6g 565m 709 syslog:1.0% 0 39|0 1|0 41k 221k 42 16:37:26

..........

*0 992 *0 *0 0 1|0 0 40.1g 80.6g 954m 751 syslog:1.1% 0 0|0 1|0 58k 309k 42 16:38:12

*0 942 *0 *0 0 3|0 0 40.1g 80.6g 964m 759 syslog:0.9% 0 0|0 0|0 55k 294k 42 16:38:13

*0 1026 *0 *0 0 1|0 0 40.1g 80.6g 974m 813 syslog:0.8% 0 0|0 0|0 60k 319k 42 16:38:14

*0 1062 *0 *0 0 3|0 0 40.1g 80.6g 985m 826 syslog:0.8% 0 0|0 0|0 62k 331k 42 16:38:15

*0 1044 *0 *0 0 1|0 0 40.1g 80.6g 995m 800 syslog:0.9% 0 0|0 0|0 61k 325k 42 16:38:16

insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time

*0 1005 *0 *0 0 3|0 0 40.1g 80.6g 1005m 785 syslog:0.7% 0 30|0 1|0 59k 313k 42 16:38:17

*0 1008 *0 *0 0 1|0 0 40.1g 80.6g 1015m 737 syslog:0.9% 0 0|0 1|0 59k 314k 42 16:38:18

*0 1137 *0 *0 0 3|0 0 40.1g 80.6g 1g 853 syslog:0.7% 0 0|0 0|0 67k 354k 42 16:38:19

*0 993 *0 *0 0 1|0 0 40.1g 80.6g 1.01g 768 syslog:0.9% 0 0|0 0|0 58k 310k 42 16:38:20

*0 1114 *0 *0 0 3|0 0 40.1g 80.6g 1.02g 811 syslog:1.0% 0 0|0 0|0 65k 346k 42 16:38:21

*0 1001 *0 *0 0 1|0 0 40.1g 80.6g 1.03g 744 syslog:1.0% 0 10|0 1|0 59k 312k 42 16:38:22

..........

*0 1892 *0 *0 0 1|0 0 40.1g 80.6g 2.03g 900 syslog:0.7% 0 1|0 1|0 111k 587k 42 16:39:44

*0 1881 *0 *0 0 3|0 0 40.1g 80.6g 2.04g 894 syslog:0.7% 0 0|0 0|0 111k 583k 42 16:39:45

*0 1927 *0 *0 0 1|0 0 40.1g 80.6g 2.06g 902 syslog:0.8% 0 0|0 0|0 113k 598k 42 16:39:46

insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time

*0 1950 *0 *0 0 3|0 0 40.1g 80.6g 2.07g 912 syslog:0.6% 0 37|0 1|0 115k 605k 42 16:39:47

*0 2086 *0 *0 0 1|0 0 40.1g 80.6g 2.09g 901 syslog:0.8% 0 0|0 1|0 123k 647k 42 16:39:48

*0 1774 *0 *0 0 3|0 0 40.1g 80.6g 2.1g 846 syslog:0.8% 0 0|0 0|0 105k 551k 42 16:39:49

.......

*0 2589 *0 *0 0 1|0 0 40.1g 80.6g 2.56g 933 syslog:0.8% 0 0|0 1|0 152k 803k 42 16:40:18

*0 2289 *0 *0 0 3|0 0 40.1g 80.6g 2.58g 849 syslog:0.9% 0 0|0 0|0 135k 710k 42 16:40:19

*0 2523 *0 *0 0 1|0 0 40.1g 80.6g 2.59g 930 syslog:0.7% 0 0|0 0|0 148k 781k 42 16:40:20

*0 2636 *0 *0 0 3|0 0 40.1g 80.6g 2.61g 878 syslog:0.8% 0 0|0 1|0 155k 817k 42 16:40:21

*0 2509 *0 *0 0 1|0 0 40.1g 80.6g 2.63g 889 syslog:0.7% 0 0|0 1|0 148k 777k 42 16:40:22

*0 2637 *0 *0 0 3|0 0 40.1g 80.6g 2.65g 916 syslog:0.7% 0 0|0 0|0 155k 817k 42 16:40:23

*0 2575 *0 *0 0 1|0 0 40.1g 80.6g 2.67g 911 syslog:0.8% 0 0|0 0|0 151k 798k 42 16:40:24

*0 2516 *0 *0 0 3|0 1 40.1g 80.6g 2.68g 873 syslog:6.5% 0 16|0 0|0 148k 779k 42 16:40:25

*0 2498 *0 *0 0 1|0 0 40.1g 80.6g 2.7g 879 syslog:0.8% 0 0|0 0|0 147k 774k 42 16:40:26

insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time

*0 2536 *0 *0 0 3|0 0 40.1g 80.6g 2.72g 872 syslog:0.7% 0 0|0 0|0 149k 786k 42 16:40:27

*0 2826 *0 *0 0 1|0 0 40.1g 80.6g 2.74g 959 syslog:0.8% 0 0|0 1|0 166k 876k 42 16:40:28

*0 2676 *0 *0 0 3|0 0 40.1g 80.6g 2.75g 925 syslog:0.8% 0 0|0 0|0 158k 829k 42 16:40:29

.......

*0 8934 *0 *0 0 1|0 0 40.1g 80.6g 4.85g 1088 syslog:0.6% 0 0|0 1|0 527k 2m 42 16:41:50

*0 9583 *0 *0 0 3|0 0 40.1g 80.6g 4.89g 1161 syslog:0.6% 0 0|0 2|0 565k 2m 42 16:41:51

*0 8982 *0 *0 0 1|0 0 40.1g 80.6g 4.93g 1107 syslog:0.6% 0 23|0 3|0 530k 2m 42 16:41:52

*0 9950 *0 *0 0 3|0 0 40.1g 80.6g 4.97g 1067 syslog:0.5% 0 0|0 0|0 587k 3m 42 16:41:53

*0 9580 *0 *0 0 1|0 1 40.1g 80.6g 5.01g 1084 syslog:0.7% 0 0|0 1|0 565k 2m 42 16:41:54

.......

*0 92475 *0 *0 0 3|0 0 40.1g 80.7g 31.9g 1 syslog:0.0% 0 0|0 18|0 5m 28m 82 16:53:28

insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn time

*0 92832 *0 *0 0 1|0 0 40.1g 80.7g 31.9g 0 syslog:0.0% 0 0|0 19|0 5m 28m 82 16:53:29

*0 92077 *0 *0 0 3|0 0 40.1g 80.7g 31.9g 0 syslog:0.0% 0 0|0 12|0 5m 28m 82 16:53:30

*0 93296 *0 *0 0 1|0 0 40.1g 80.7g 31.9g 0 syslog:0.1% 0 0|0 18|0 5m 28m 82 16:53:31

*0 91269 *0 *0 0 3|0 0 40.1g 80.7g 31.9g 0 syslog:0.0% 0 1|0 10|0 5m 28m 82 16:53:32

*0 93878 *0 *0 0 1|0 0 40.1g 80.7g 31.9g 0 syslog:0.0%

MongoDB,随机查询,性能测试

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1亿条记录的MongoDB数据库随机查询性能测试

MongoDB,随机查询,性能测试

MySQL和MongoDB设计实例对比分析

Redis解决库存超卖问题实例讲解

评论“1亿条记录的MongoDB数据库随机查询性能测试”

RTX 5090要首发性能要翻倍！三星展示GDDR7显存

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友情链接

1亿条记录的MongoDB数据库随机查询性能测试

MongoDB,随机查询,性能测试

MySQL和MongoDB设计实例对比分析

Redis解决库存超卖问题实例讲解

评论“1亿条记录的MongoDB数据库随机查询性能测试”

RTX 5090要首发 性能要翻倍！三星展示GDDR7显存

更新日志

友情链接

RTX 5090要首发性能要翻倍！三星展示GDDR7显存