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Implement $bucket and $group on indexed values with sub-linear runtime

We noticed that sum $bucket and $group aggregations such as $min, $max, $count are unexpectedly slow even when fully covered by an index, (partially) because the DB scans through the entire index rather than employing optimization approaches such ...

Guest over 3 years ago in Performance & Optimization 0 Submitted

3 VOTE

Making operations that hang indefinitely more visible

Hi Team, It would be useful for some kind of timeout message to be implemented if an operation is waiting on commitQuorum - say wait an hour and then return an error message with "Can't perform operation, required number of commitQuorum members n...

Frederik Nosi over 1 year ago in Storage & Transactions 1 Submitted

11 VOTE

Additional checks for storage consistency

The following opt-in features would add additional check to check for storage layer corruptions of collections. 1. Upon write read what data was committed to disk. 2. Periodic or scheduled scanning of a collection. Similar to collection.validate ...

Guest about 6 years ago in Storage & Transactions 0 Submitted

6 VOTE

sharding error shardsvr

Make it clear which node is causing the "shardsvr" error. Spawned from support case 01042995 Our error occurred when the user tried to connect using Compass. The failure was to list the collection names on one database. The error presented back...

Guest over 3 years ago in Storage & Transactions 0 Submitted

3 VOTE

add IO throughput related fields to 'serverStatus' output

There is no IO throughput related fields in the result of serverStatus, instead in FTDC this is available in the disk metrics. Need it in `serverStatus` output so that we can monitor it.

Guest almost 3 years ago in Storage & Transactions 1 Submitted

1 VOTE

Provide a dictionary for matched/modified/deleted counts for bulk writes

Current bulk write operations provide only aggregated counts that look like this: ``` { acknowledged: true, insertedCount: 0, insertedIds: {}, matchedCount: 2, modifiedCount: 2, deletedCount: 0, upsertedCount: 0, upsertedIds: {} } ``` All ...

Guest about 1 year ago in Performance & Optimization 0 Submitted

1 VOTE

Execute $group on shardPart instead of mergerPart

Basically what is described here: https://www.mongodb.com/community/forums/t/how-to-enforce-mongodb-to-execute-group-on-shardpart-of-the-execution-plan/267560 When running covered count queries that could be aggregated independently on the shards...

Guest about 1 year ago in Performance & Optimization 0 Submitted

3 VOTE

Enable BigInt Support for Blockchain Use

Smart contracts on Ethereum and on Ethereum compatible chains are represented as 256bit integers. There are several libraries widely used to deal with these data types in JavaScript such as bn.js and BigNumber.js. A potential workaround could be...

Guest almost 4 years ago in Storage & Transactions 0 Submitted

3 VOTE

Allow changing compression of an existing collection

I'd like to switch my database from Snappy to Zstd compression. Currently, it doesn't seem that it is possible to change the compression of an existing collection. It would be nice if there were a way to do this, even if (for example) it requi...

Guest almost 4 years ago in Storage & Transactions 0 Submitted

4 VOTE

wired

wiredTiger open files usage Currently WT uses a file per collection and index, leading in some scenarios to extremely high number of open files/dhandles. Is there any plan to support one file/dhandle per database?

Guest over 5 years ago in Storage & Transactions 0 Submitted

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