Technologies/Django/django.cache.hits
DjangoDjangoMetric

django.cache.hits

Successful cache retrievals
Dimensions:None
Available on:DatadogDatadog (1)
Interface Metrics (1)
DatadogDatadog
Number of successful cache retrievals
Dimensions:None
Sources
django.cache.hitsdocs.datadoghq.com

Technical Annotations (34)

Configuration Parameters (9)
shared_buffers
PostgreSQL memory cache size - increase if cache hit ratio is low
timeoutrecommended: 60 * 60
Cache expiry in seconds; example shows 1 hour for redis_cache.set()
CACHES.BACKENDrecommended: django.core.cache.backends.memcached.PyMemcacheCache
Memcached backend loses data on restart
CACHES.OPTIONS.CULL_FREQUENCYrecommended: 3
default value; 0 dumps entire cache, 2 culls half, 3 culls one-third
CACHES.OPTIONS.MAX_ENTRIESrecommended: 300
cache capacity threshold that triggers culling
key_prefixrecommended: unique prefix per view
Set in @cache_page decorator to enable programmatic cache key discovery
CACHES.default.BACKENDrecommended: django_redis.cache.RedisCache
Preferred over django.core.cache.backends.db.DatabaseCache for performance
LOCATIONrecommended: 127.0.0.1:11211
must point to running Memcached server address and port
HITCOUNT_CACHErecommended: cached_hitcount
Must match a key in Django CACHES settings dict
Error Signatures (1)
ConnectionRefusedError: [Errno 111] Connection refusedexception
CLI Commands (4)
./manage.py shelldiagnostic
cache.has_key('/post/1234/')diagnostic
cache.has_key('domain.com/post/1234/')diagnostic
cache.has_key('www.domain.com/post/1234/')diagnostic
Technical References (20)
Django Debug Toolbarcomponentcache panelcomponentRediscomponentdjango_cache_get_hits_totalcomponentdjango_cache_get_misses_totalcomponentTTLconceptpost_savecomponentpost_deletecomponentcache keyconceptRedisCachecomponentredis_cache.setcomponent@cache_pagecomponentget_cache_keycomponentdefault_key_funccomponentcache_pagecomponentabsolute_uriconceptdjango.core.cachecomponentMemcachedCachecomponentmemcachecomponentCACHEScomponent
Related Insights (15)
Low cache hit ratio indicates ineffective cache configurationinfo
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Repeatedly called endpoints without caching increase database loadwarning
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Cache hit ratio below 70% indicates inefficient cachingwarning
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Stale cached QuerySet data from missing invalidationwarning
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Cache key without authorization context causes unauthorized data accesscritical
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Database bottleneck causes response time spikes during high trafficwarning
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Improper cache expiry time causes stale data or server overloadwarning
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Memcached data loss on server crash or restartwarning
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CULL_FREQUENCY=0 causes full cache dump at capacitywarning
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Page cache invalidation requires complex manual key managementinfo
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Database cache backend defeats primary caching purposewarning
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Stale cache served after updates due to key mismatchwarning
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Memcached server unreachable causes connection refusedcritical
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Memcache unavailability prevents hit trackingwarning
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Cache hit ratio below 85% indicates optimization neededwarning
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