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| author | Haley Connelly <haley.connelly@mongodb.com> | 2022-05-27 15:52:17 +0000 |
|---|---|---|
| committer | Evergreen Agent <no-reply@evergreen.mongodb.com> | 2022-05-27 17:07:46 +0000 |
| commit | 1e84419513046d4f5755f06bfeebaf8ec442583e (patch) | |
| tree | 0ba69026c68781ec60ba818484ef586f4dc5f39e /src/mongo/db/ttl.idl | |
| parent | 63f17f3aef165460580a39906fc645046b4b4680 (diff) | |
| download | mongo-1e84419513046d4f5755f06bfeebaf8ec442583e.tar.gz | |
SERVER-56194 Make TTL deletes fair
Diffstat (limited to 'src/mongo/db/ttl.idl')
| -rw-r--r-- | src/mongo/db/ttl.idl | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/src/mongo/db/ttl.idl b/src/mongo/db/ttl.idl index 93cae7d7499..184cc990fd7 100644 --- a/src/mongo/db/ttl.idl +++ b/src/mongo/db/ttl.idl @@ -46,8 +46,50 @@ server_parameters: gt: 0 ttlMonitorBatchDeletes: - description: "Allow the TTL monitor to batch deletes." + description: + "When enabled, the TTLMonitor batches TTL deletions and also removes expired documents + more fairly among the TTL indexes. When disabled, it falls back to legacy + doc-by-document deletions." set_at: [ startup, runtime ] cpp_vartype: AtomicWord<bool> cpp_varname: ttlMonitorBatchDeletes default: true + + ttlMonitorSubPassTargetSecs: + description: + "Limits (approximately) the amount of time spent iterating over a set TTL indexes where + expired documents remain. Additionally, the frequency at which we refresh the view of + TTL indexes within a pass where documents remain. 0 means each TTL index will be + iterated over once before the sub-pass completes. Only applicable when + 'ttlMonitorBatchDeletes' is true." + set_at: [ startup, runtime ] + cpp_vartype: AtomicWord<int> + cpp_varname: ttlMonitorSubPassTargetSecs + default: 60 + validator: + gte: 0 + + ttlIndexDeleteTargetTimeMS: + description: + "Limits (approximately) the time, in milliseconds, spent performing a batched delete + pass over a given TTL index. 0 means unlimited. Only applicable when + 'ttlMonitorBatchDeletes' is true." + set_at: [ startup, runtime ] + cpp_vartype: AtomicWord<int> + cpp_varname: ttlIndexDeleteTargetTimeMS + default: 1000 + validator: + gte: 0 + + ttlIndexDeleteTargetDocs: + description: + "Limits (approximately) the number of expired documents removed from a TTL index over a + batched delete. 0 means unlimited. Only applicable when 'ttlMonitorBatchDeletes' is + true." + set_at: [ startup, runtime ] + cpp_vartype: AtomicWord<int> + cpp_varname: ttlIndexDeleteTargetDocs + default: 50000 + validator: + gte: 0 + |