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MySQL and SSD
Vadim TkachenkoPercona Inc, co-founder, CTO
www.percona.comwww.SSDPerformanceBlog.com
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World is spinning
MySQL and SSD
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Physical limits
MySQL and SSD
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Rotate faster
MySQL and SSD
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millisecondsAccess time
MySQL and SSD
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More spindles
MySQL and SSD
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Still milliseconds
MySQL and SSD
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Access time
MySQL and SSD
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MySQL and SSD
Data fits into memory
Data
exceeds
memory
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MySQL and SSD
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Flash Access time
MySQL and SSD
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MySQL throughput with Flash
MySQL and SSD
5x+Times difference
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Flash
MySQL and SSD
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MySQL and SSD
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Erase size
MySQL and SSD
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Write once
MySQL and SSD
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MySQL and SSD
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No rewrites
MySQL and SSD
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MySQL and SSD
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Garbage collector
MySQL and SSD
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Write amplificationFlash writes more than application
MySQL and SSD
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Software matters
MySQL and SSD
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Hardware is less important
MySQL and SSD
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MySQL and SSD
Firmware
+
execution
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Flash quality is defined by software
MySQL and SSD
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Flash types
MySQL and SSD
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Single Level Cell – 1bit
MySQL and SSD
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Multi Level Cell – 2 bit
MySQL and SSD
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Multi Level Cell – 3 bit
MySQL and SSD
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SLC vs MLC
MySQL and SSD
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Erase cycles
MySQL and SSD
• SLC 100.000 cycles
• MLC 10.000 cycles
• 25nm MLC 5.000 cycles
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SLC
MySQL and SSD
![Page 33: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/33.jpg)
MLC
MySQL and SSD
![Page 34: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/34.jpg)
Space provisioning – Virident FlashMax 1400
MySQL and SSD
User space
1.4TB
Internal Space
0.6TB
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SATA vs PCI Express
MySQL and SSD
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SATA SSD
MySQL and SSD
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My benchmarks story2 Intel 320 SSD cards
MySQL and SSD
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How do I install it?
MySQL and SSD
![Page 39: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/39.jpg)
I need
MySQL and SSD
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Initial setup
MySQL and SSD
![Page 41: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/41.jpg)
Polished setup - AccuSTOR AS108X
MySQL and SSD
![Page 42: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/42.jpg)
RAID controllers
MySQL and SSD
![Page 43: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/43.jpg)
Last component - cable
MySQL and SSD
![Page 44: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/44.jpg)
PCIe is different
MySQL and SSD
![Page 45: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/45.jpg)
PCIe
MySQL and SSD
![Page 46: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/46.jpg)
Just plug into a PCIe slotBut SATA is hot-swap
MySQL and SSD
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Benchmarks lie
MySQL and SSD
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Benchmark challenge: internal state
MySQL and SSD
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Benchmark challenge: capacity
MySQL and SSD
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Unrepeatable results
MySQL and SSD
![Page 51: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/51.jpg)
Benchmark challenge: filesystems
MySQL and SSD
![Page 52: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/52.jpg)
Benchmark challenge: filesystems
MySQL and SSD
![Page 53: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/53.jpg)
Xfs already fixed bug in source code4x improvement
MySQL and SSD
![Page 54: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/54.jpg)
Benchmark challenge: filesystems
MySQL and SSD
![Page 55: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/55.jpg)
Ext4 – sync – random write
MySQL and SSD
![Page 56: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/56.jpg)
xfs – sync – random write
MySQL and SSD
![Page 57: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/57.jpg)
Ext4 vs xfs – async
MySQL and SSD
135
98
0
20
40
60
80
100
120
140
160
ext4 xfs
MiB
/ s
ec
async writes
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To add to confusion: in MySQL
MySQL and SSD
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Ext4 vs xfs – your choice
MySQL and SSD
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Comparing apples
MySQL and SSD
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Flash vendors~50 on market
MySQL and SSD
![Page 62: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/62.jpg)
Random 16KiB reads
MySQL and SSD
50
222
417
195
1300
0
200
400
600
800
1000
1200
1400
MiB
/ s
ec
8 HDDSTEC4 STECIntelVirident
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Random 16KiB writes
MySQL and SSD
35
135
223
92
520
0
100
200
300
400
500
600
MiB
/ s
ec
8 HDDSTEC4 STECIntelVirident
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Price
MySQL and SSD
24001500
6000
270
18000
02000400060008000
100001200014000160001800020000
Pric
e, $
8 HDDSTEC4 STECIntelVirident
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PCIe vs SATAWhich one to choose?
MySQL and SSD
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PCIe for absolute performanceI use it because I have free samples
MySQL and SSD
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SATA for performance per $I would use it if I had to buy…
MySQL and SSD
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When should I use flash?
MySQL and SSD
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Very good for random readsBoth SLC and MLC
MySQL and SSD
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Random WritesMaybe challenge for MLC
MySQL and SSD
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SLC lifetime
MySQL and SSD
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MLC lifetime
MySQL and SSD
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Write amplification
MySQL and SSD
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Experiment – tpcc-mysql
MySQL and SSD
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Flash for MySQL
MySQL and SSD
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When Flash helps
MySQL and SSD
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Most important decision
MySQL and SSD
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MySQL and SSD
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You need
MySQL and SSD
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Choices
MySQL and SSD
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Benchmarks again
MySQL and SSD
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MySQL and SSD
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STEC SSD vs HDD: 8x gain
MySQL and SSD
750
90
0
100
200
300
400
500
600
700
800
SSD HDD
tps
![Page 84: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/84.jpg)
STEC innodb_flush_log_at_trx_commit
MySQL and SSD
750
490
0
100
200
300
400
500
600
700
800
trx_commit=2 trx_commit=1
tps
![Page 85: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/85.jpg)
MySQL IO workloads
MySQL and SSD
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innodb_flush_log_at_trx_commit=1
MySQL and SSD
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STEC: InnoDB log location
MySQL and SSD
740
490
0
100
200
300
400
500
600
700
800
logs on RAID with cache logs on SSD
tps
![Page 88: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/88.jpg)
STEC – RAID card
MySQL and SSD
750810
0100200300400500600700800900
LSI 9211 (no cache) LSI 9260 (with cache)
tps
![Page 89: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/89.jpg)
Log size matters
MySQL and SSD
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Big log file 8GB (Percona Server)
MySQL and SSD
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Flushing algorithm is important
MySQL and SSD
![Page 92: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/92.jpg)
Innodb_adaptive_checkpoint=keep_average(Percona Server)
MySQL and SSD
![Page 93: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/93.jpg)
DoubleWrite area is important
MySQL and SSD
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DoubleWrite is a protection
MySQL and SSD
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DoubleWrite is rewriting the same area
MySQL and SSD
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Rewrites of the same area
MySQL and SSD
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Consider moving doublewrite • Innodb_doublewrite_file =• Percona Server
• ibdata1• For general MySQL
MySQL and SSD
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Fusion-io to support atomic writes1.5x performance improvement
MySQL and SSD
![Page 99: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/99.jpg)
Misc
MySQL and SSD
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Misc filesystem
MySQL and SSD
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Is Flash expensive?
MySQL and SSD
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Consolidation
MySQL and SSD
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Power savings
MySQL and SSD
![Page 104: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/104.jpg)
New Relic
MySQL and SSD
Dell PowerEdge R610
Dell PowerVault MD1220
![Page 105: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/105.jpg)
MySQL and SSD
Perc H800RAID511 Intel 320 SSD 600GB
![Page 106: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/106.jpg)
MySQL and SSD
6xtimes difference
![Page 107: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/107.jpg)
Scale Up, not Scale Out
MySQL and SSD
![Page 108: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/108.jpg)
“Flash made everything faster, but more confusing”
MySQL and SSD
![Page 109: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/109.jpg)
Pictures credits• http://
www.sunrainet.com/hdd-vs-ssd-speed-test-video-windows-7-boot-up.html• http://blog.familytreemagazine.com/insider/content/binary/datacenter-2.jpg
MySQL and SSD
![Page 110: MySQL and SSD - Percona · STEC SSD vs HDD: 8x gain MySQL and SSD 750 90 0 100 200 300 400 500 600 700 800 SSD HDD t p s. STEC innodb_flush_log_at_trx_commit MySQL and SSD 750 490](https://reader034.vdocuments.site/reader034/viewer/2022050515/5f9f5a756ea1ab72ed0f9146/html5/thumbnails/110.jpg)
Thank you!
MySQL and SSD