1. Memcache
Lightning fast object retrieval
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2. Site too slow?
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3. Can’t serve all requests?
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4. Memcache
may be for you.
But maybe not.
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5. Do you have spare
resources?
• Spare memory?
• webserver
• fileserver
• database server
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6. What’s cheapest to add?
• More webservers?
• More database servers?
• More memory servers?
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7. Memory servers are
cheap
• You may have spare memory on your
network
• Memory servers don’t need hard disks
• Memory servers don’t need fast CPUs
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8. Memory cache can turn
down the heat
• Less PHP processing
• Fewer database queries
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9. Advantages of
Memcache
• Memory based and fast
• Keys and bytes (anything goes in)
• Cache things only once
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10. Redundant caches
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11. Single shared cache
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12. What do you need?
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13. Memcached server
http://danga.com/
memcached/
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14. Memcache PECL
extension
http://pecl.php.net/
package/memcache
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15. Spare memory.
4MB - nGB
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16. Memcache Drupal
module
http://drupal.org/projects/memcache
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17. Memcache Drupal
module
• A module
• An include file /includes/memcache.inc
• Patches
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18. Why do you need
patches?
• We’re caching things that Drupal normally
doesn’t cache
• Built nodes
• Taxonomy terms, vocabularies, trees
• Comments
• Paths
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19. Who should use
memcache?
• A personal blog (Apache, MySql on one box)
Page requests went from 400ms to 100ms
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20. Large Media site
• Handles yearly spikes by adding a cluster of
memcache servers during the spike
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22. Soon to come
• Admin section
• Statistics
• Clustering
• Bins
• Greater abstraction at the Drupal cache
layer
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