Очень медленные VPS, ни о каком ssd не может быть и речи. В разы медленнее чем аналогичные по стоимости hetzner или ihor.

root@skyhost-testserver:~# dd bs=1M count=512 if=/dev/zero of=test conv=fdatasync
512+0 records in
512+0 records out
536870912 bytes (537 MB, 512 MiB) copied, 6.55595 s, 81.9 MB/s
root@skyhost-testserver:~# sysbench --test=cpu --cpu-max-prime=20000 run
WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options.
sysbench 1.0.11 (using system LuaJIT 2.1.0-beta3)

Running the test with following options:
Number of threads: 1
Initializing random number generator from current time

Prime numbers limit: 20000

Initializing worker threads...

Threads started!

CPU speed:
events per second: 86.46

General statistics:
total time: 10.4733s
total number of events: 906

Latency (ms):
min: 5.43
avg: 11.55
max: 506.91
95th percentile: 6.79
sum: 10463.61

Threads fairness:
events (avg/stddev): 906.0000/0.00
execution time (avg/stddev): 10.4636/0.00

root@skyhost-testserver:~# sysbench --test=memory --memory-total-size=1G run
WARNING: the --test option is deprecated. You can pass a script name or path on the command line without any options.
sysbench 1.0.11 (using system LuaJIT 2.1.0-beta3)

Running the test with following options:
Number of threads: 1
Initializing random number generator from current time

Running memory speed test with the following options:
block size: 1KiB
total size: 1024MiB
operation: write
scope: global

Initializing worker threads...

Threads started!

Total operations: 1048576 (1703224.55 per second)

1024.00 MiB transferred (1663.31 MiB/sec)

General statistics:
total time: 0.6100s
total number of events: 1048576

Latency (ms):
min: 0.00
avg: 0.00
max: 0.55
95th percentile: 0.00
sum: 280.54

Threads fairness:
events (avg/stddev): 1048576.0000/0.00
execution time (avg/stddev): 0.2805/0.00

root@skyhost-testserver:~# ioping . -c 10
4 KiB <<< . (ext4 /dev/sda1): request=1 time=713.6 us (warmup)
4 KiB <<< . (ext4 /dev/sda1): request=2 time=540.5 us
4 KiB <<< . (ext4 /dev/sda1): request=3 time=800.8 us
4 KiB <<< . (ext4 /dev/sda1): request=4 time=587.6 us
4 KiB <<< . (ext4 /dev/sda1): request=5 time=910.0 us
4 KiB <<< . (ext4 /dev/sda1): request=6 time=609.4 us
4 KiB <<< . (ext4 /dev/sda1): request=7 time=562.3 us
4 KiB <<< . (ext4 /dev/sda1): request=8 time=618.9 us
4 KiB <<< . (ext4 /dev/sda1): request=9 time=535.9 us (fast)
4 KiB <<< . (ext4 /dev/sda1): request=10 time=499.4 us (fast)

--- . (ext4 /dev/sda1) ioping statistics ---
9 requests completed in 5.66 ms, 36 KiB read, 1.59 k iops, 6.21 MiB/s
generated 10 requests in 9.00 s, 40 KiB, 1 iops, 4.44 KiB/s
min/avg/max/mdev = 499.4 us / 629.4 us / 910.0 us / 128.4 us
root@skyhost-testserver:~# ioping -RD .

--- . (ext4 /dev/sda1) ioping statistics ---
1.65 k requests completed in 2.98 s, 6.45 MiB read, 553 iops, 2.16 MiB/s
generated 1.65 k requests in 3.00 s, 6.46 MiB, 550 iops, 2.15 MiB/s
min/avg/max/mdev = 293.6 us / 1.81 ms / 26.9 ms / 1.89 ms
root@skyhost-testserver:~# ioping -RL .

--- . (ext4 /dev/sda1) ioping statistics ---
609 requests completed in 2.94 s, 152.2 MiB read, 207 iops, 51.8 MiB/s
generated 610 requests in 3.00 s, 152.5 MiB, 203 iops, 50.8 MiB/s
min/avg/max/mdev = 1.83 ms / 4.83 ms / 25.3 ms / 2.79 ms
root@skyhost-testserver:~# ioping -RC .

--- . (ext4 /dev/sda1) ioping statistics ---
451.1 k requests completed in 2.92 s, 1.72 GiB read, 154.3 k iops, 602.7 MiB/s
generated 451.1 k requests in 3.00 s, 1.72 GiB, 150.4 k iops, 587.3 MiB/s
min/avg/max/mdev = 1.82 us / 6.48 us / 496.3 ms / 1.09 ms
root@skyhost-testserver:~# wget cachefly.cachefly.net/100mb.test
--2019-03-19 17:17:31-- http://cachefly.cachefly.net/100mb.test
Resolving cachefly.cachefly.net (cachefly.cachefly.net)... 205.234.175.175
Connecting to cachefly.cachefly.net (cachefly.cachefly.net)|205.234.175.175|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 104857600 (100M) [application/octet-stream]
Saving to: ‘100mb.test’

100mb.test 100%[===============================================================================>] 100.00M 3.40MB/s in 30s

2019-03-19 17:18:01 (3.39 MB/s) - ‘100mb.test’ saved [104857600/104857600]

root@skyhost-testserver:~# fio --name TEST --eta-newline=5s --filename=fio-tempfile.dat --rw=randread --size=500m --io_size=10g --blocksize=4k --ioengine=libaio --fsync=1 --iodepth=1 --direct=1 --numjobs=1 --runtime=60 --group_reporting
TEST: (g=0): rw=randread, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=1
fio-3.1
Starting 1 process
TEST: Laying out IO file (1 file / 500MiB)
Jobs: 1 (f=1): [r(1)][11.7%][r=216KiB/s,w=0KiB/s][r=54,w=0 IOPS][eta 00m:53s]
Jobs: 1 (f=1): [r(1)][21.7%][r=1585KiB/s,w=0KiB/s][r=396,w=0 IOPS][eta 00m:47s]
Jobs: 1 (f=1): [r(1)][31.7%][r=1428KiB/s,w=0KiB/s][r=357,w=0 IOPS][eta 00m:41s]
Jobs: 1 (f=1): [r(1)][41.7%][r=1640KiB/s,w=0KiB/s][r=410,w=0 IOPS][eta 00m:35s]
Jobs: 1 (f=1): [r(1)][51.7%][r=212KiB/s,w=0KiB/s][r=53,w=0 IOPS][eta 00m:29s]
Jobs: 1 (f=1): [r(1)][61.7%][r=1641KiB/s,w=0KiB/s][r=410,w=0 IOPS][eta 00m:23s]
Jobs: 1 (f=1): [r(1)][71.7%][r=1496KiB/s,w=0KiB/s][r=374,w=0 IOPS][eta 00m:17s]
Jobs: 1 (f=1): [r(1)][81.7%][r=1636KiB/s,w=0KiB/s][r=409,w=0 IOPS][eta 00m:11s]
Jobs: 1 (f=1): [r(1)][91.7%][r=340KiB/s,w=0KiB/s][r=85,w=0 IOPS][eta 00m:05s]
Jobs: 1 (f=1): [r(1)][100.0%][r=32KiB/s,w=0KiB/s][r=8,w=0 IOPS][eta 00m:00s]
TEST: (groupid=0, jobs=1): err= 0: pid=16028: Tue Mar 19 17:19:12 2019
read: IOPS=295, BW=1183KiB/s (1211kB/s)(69.8MiB/60467msec)
slat (usec): min=32, max=2704, avg=73.57, stdev=50.43
clat (usec): min=203, max=893787, avg=3285.36, stdev=24681.80
lat (usec): min=274, max=893876, avg=3362.29, stdev=24681.98
clat percentiles (usec):
| 1.00th=[ 326], 5.00th=[ 1004], 10.00th=[ 1369], 20.00th=[ 1532],
| 30.00th=[ 1663], 40.00th=[ 1795], 50.00th=[ 1942], 60.00th=[ 2147],
| 70.00th=[ 2474], 80.00th=[ 3064], 90.00th=[ 4228], 95.00th=[ 5669],
| 99.00th=[ 11469], 99.50th=[ 14091], 99.90th=[450888], 99.95th=[801113],
| 99.99th=[884999]
bw ( KiB/s): min= 24, max= 1992, per=100.00%, avg=1288.14, stdev=536.91, samples=111
iops : min= 6, max= 498, avg=321.98, stdev=134.23, samples=111
lat (usec) : 250=0.11%, 500=3.40%, 750=1.17%, 1000=0.31%
lat (msec) : 2=48.37%, 4=35.43%, 10=9.85%, 20=1.09%, 50=0.15%
lat (msec) : 100=0.02%, 500=0.01%, 750=0.01%, 1000=0.08%
cpu : usr=1.11%, sys=3.12%, ctx=17881, majf=0, minf=11
IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwt: total=17876,0,0, short=0,0,0, dropped=0,0,0
latency : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
READ: bw=1183KiB/s (1211kB/s), 1183KiB/s-1183KiB/s (1211kB/s-1211kB/s), io=69.8MiB (73.2MB), run=60467-60467msec

Disk stats (read/write):
sda: ios=17942/13, merge=0/11, ticks=57820/1356, in_queue=972, util=0.95%
root@skyhost-testserver:~# fio --name TEST --eta-newline=5s --filename=fio-tempfile.dat --rw=randrw --size=500m --io_size=10g --blocksize=4k --ioengine=libaio --fsync=1 --iodepth=1 --direct=1 --numjobs=1 --runtime=60 --group_reporting
TEST: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=libaio, iodepth=1
fio-3.1
Starting 1 process
Jobs: 1 (f=1): [m(1)][11.7%][r=176KiB/s,w=156KiB/s][r=44,w=39 IOPS][eta 00m:53s]
Jobs: 1 (f=1): [m(1)][21.7%][r=140KiB/s,w=128KiB/s][r=35,w=32 IOPS][eta 00m:47s]
Jobs: 1 (f=1): [m(1)][31.7%][r=140KiB/s,w=124KiB/s][r=35,w=31 IOPS][eta 00m:41s]
Jobs: 1 (f=1): [m(1)][41.7%][r=128KiB/s,w=128KiB/s][r=32,w=32 IOPS][eta 00m:35s]
Jobs: 1 (f=1): [m(1)][51.7%][r=140KiB/s,w=132KiB/s][r=35,w=33 IOPS][eta 00m:29s]
Jobs: 1 (f=1): [m(1)][61.7%][r=160KiB/s,w=160KiB/s][r=40,w=40 IOPS][eta 00m:23s]
Jobs: 1 (f=1): [m(1)][71.7%][r=124KiB/s,w=148KiB/s][r=31,w=37 IOPS][eta 00m:17s]
Jobs: 1 (f=1): [m(1)][81.7%][r=104KiB/s,w=108KiB/s][r=26,w=27 IOPS][eta 00m:11s]
Jobs: 1 (f=1): [m(1)][91.7%][r=52KiB/s,w=64KiB/s][r=13,w=16 IOPS][eta 00m:05s]
Jobs: 1 (f=1): [m(1)][100.0%][r=160KiB/s,w=160KiB/s][r=40,w=40 IOPS][eta 00m:00s]
TEST: (groupid=0, jobs=1): err= 0: pid=16033: Tue Mar 19 17:20:15 2019
read: IOPS=28, BW=114KiB/s (117kB/s)(6868KiB/60004msec)
slat (usec): min=37, max=1009, avg=110.16, stdev=51.41
clat (usec): min=261, max=882182, avg=3561.34, stdev=27538.34
lat (usec): min=305, max=882255, avg=3676.25, stdev=27538.91
clat percentiles (usec):
| 1.00th=[ 404], 5.00th=[ 1156], 10.00th=[ 1319], 20.00th=[ 1500],
| 30.00th=[ 1614], 40.00th=[ 1762], 50.00th=[ 1926], 60.00th=[ 2114],
| 70.00th=[ 2442], 80.00th=[ 2933], 90.00th=[ 4146], 95.00th=[ 5866],
| 99.00th=[ 11994], 99.50th=[ 16712], 99.90th=[700449], 99.95th=[884999],
| 99.99th=[884999]
bw ( KiB/s): min= 8, max= 248, per=100.00%, avg=119.37, stdev=56.48, samples=115
iops : min= 2, max= 62, avg=29.79, stdev=14.14, samples=115
write: IOPS=29, BW=119KiB/s (122kB/s)(7124KiB/60004msec)
slat (usec): min=55, max=3239, avg=131.19, stdev=117.31
clat (usec): min=245, max=15143, avg=689.22, stdev=776.08
lat (usec): min=352, max=15233, avg=825.11, stdev=790.78
clat percentiles (usec):
| 1.00th=[ 297], 5.00th=[ 343], 10.00th=[ 367], 20.00th=[ 412],
| 30.00th=[ 453], 40.00th=[ 494], 50.00th=[ 537], 60.00th=[ 586],
| 70.00th=[ 644], 80.00th=[ 742], 90.00th=[ 988], 95.00th=[ 1319],
| 99.00th=[ 4080], 99.50th=[ 6783], 99.90th=[11731], 99.95th=[15139],
| 99.99th=[15139]
bw ( KiB/s): min= 8, max= 216, per=100.00%, avg=122.75, stdev=47.53, samples=116
iops : min= 2, max= 54, avg=30.64, stdev=11.90, samples=116
lat (usec) : 250=0.03%, 500=22.36%, 750=20.35%, 1000=5.17%
lat (msec) : 2=28.70%, 4=17.50%, 10=5.15%, 20=0.54%, 50=0.06%
lat (msec) : 100=0.06%, 250=0.03%, 750=0.03%, 1000=0.03%
cpu : usr=0.39%, sys=1.18%, ctx=7845, majf=0, minf=12
IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwt: total=1717,1781,0, short=0,0,0, dropped=0,0,0
latency : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
READ: bw=114KiB/s (117kB/s), 114KiB/s-114KiB/s (117kB/s-117kB/s), io=6868KiB (7033kB), run=60004-60004msec
WRITE: bw=119KiB/s (122kB/s), 119KiB/s-119KiB/s (122kB/s-122kB/s), io=7124KiB (7295kB), run=60004-60004msec

Disk stats (read/write):
sda: ios=1714/7947, merge=0/2637, ticks=6072/52036, in_queue=88, util=0.12%