Operating System Overhead on DBMSs - Harvard University
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Operating System Overhead on DBMSs Robert Bowden Motivation Problem: DBMSs are run on general purpose operating systems, various aspects of which (e.g., the file system) may harm DBMS performance. Results Idea Remove: • buffer cache • process management • system call and context switch overhead • scheduling • … 39% improvement! Strip out OS functionality to measure overhead on DBMS + * Peter, S., et al. (2014). Towards High-Performance Application-Level Storage Man- agement. In Proc. Workshop Hot Topics in Storage and File System (HotStorage). * System call overhead for a "write" operation is on the order of flash memory latency. 0 50 100 150 200 Ubuntu OSv Total Time for 10000 transac1ons (seconds, lower is be7er) 0 10 20 30 40 50 60 70 80 90 Ubuntu OSv Transac'ons per Second (higher is be3er) Running Sysbench on MySQL From these results, it is evident that an operating system designed specifically for DBMS support can have substantial performance benefits.
Transcript of Operating System Overhead on DBMSs - Harvard University
Operating System Overhead on DBMSsRobert Bowden
MotivationProblem: DBMSs are run on general purpose
operating systems, various aspects of which (e.g., the file system) may harm DBMS performance.
Results
IdeaRemove:
• buffer cache
• process management
• system call and context switch overhead
• scheduling
• …
39% improvement!
Strip out OS functionality to measure overhead on DBMS
+
* Peter, S., et al. (2014). Towards High-Performance Application-Level Storage Man-agement. In Proc. Workshop Hot Topics in Storage and File System (HotStorage).
*
System call overhead for a "write" operation is on the order of flash memory latency.
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Ubuntu" OSv"
Total&Time&for&10000&transac1ons&(seconds,&lower&is&be7er)&
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Ubuntu" OSv"
Transac'ons)per)Second)(higher)is)be3er))
Running Sysbench on MySQL
From these results, it is evident that an operating system designed specifically for DBMS support can have
substantial performance benefits.
