performance - what are the best ways to mitigate database i/o bottoleneck for large web sites? -


for large web sites (traffic wise) has alot of incoming reads , updates end being database i/os, what're best ways mitigate performance impact? 1 solution can think of - write, cache , delayed write (using separate job); read, use memcached concept. other better solutions?

here common solutions database performance:

  • caching (memcache, etc)
  • add memory database
  • more database servers (master/slave or sharding)
  • use different database type (nosql, redis, etc)
  • indexes speed read perf. (careful, many affect write performance)
  • ssds (fast ssds lot)
  • raid
  • optimize/tune sql queries

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