diff options
Diffstat (limited to 'src/mongo/db/query/query_knobs.h')
| -rw-r--r-- | src/mongo/db/query/query_knobs.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/mongo/db/query/query_knobs.h b/src/mongo/db/query/query_knobs.h index ed4304de4ae..08597794fbf 100644 --- a/src/mongo/db/query/query_knobs.h +++ b/src/mongo/db/query/query_knobs.h @@ -63,13 +63,20 @@ extern AtomicBool internalQueryPlannerEnableHashIntersection; // plan cache // -// How many entries in the cache? +// The maximum number of entries allowed in a given collection's plan cache. extern AtomicInt32 internalQueryCacheSize; // How many feedback entries do we collect before possibly evicting from the cache based on bad // performance? extern AtomicInt32 internalQueryCacheFeedbacksStored; +// Limits the amount of debug info stored across all plan caches in the system. Once the estimate of +// the number of bytes used across all plan caches exceeds this threshold, then debug info is not +// stored alongside new cache entries, in order to limit plan cache memory consumption. If plan +// cache entries are freed and the estimate once again dips below this threshold, then new cache +// entries will once again have debug info associated with them. +extern AtomicInt64 internalQueryCacheMaxSizeBytesBeforeStripDebugInfo; + // How many times more works must we perform in order to justify plan cache eviction // and replanning? extern AtomicDouble internalQueryCacheEvictionRatio; |