For standard indexes using Plasma, the maximum size for Log Structured Store segment files, in bytes. Index compaction and space reclamation are triggered when the segment file size reaches this value.

The default value is 512 MiB on Microsoft Windows and 4 GiB on GNU Linux and macOS. Specifying a lower value (for example, 64 MiB) may trigger index compaction more frequently in cases where an index uses a lot of disk space, or index fragmentation is high.

This setting only applies to indexes created after the setting is changed. For existing indexes, you must rebuild the index after changing the setting.

For more information, see Standard Index Storage.

Sets the batch size Couchbase Server uses when rebuilding index files during rebalance. This setting has no effect on file-based rebalance.

Couchbase Server breaks the rebuilding of indexes during a rebalance into batches to limit the effect on performance. This setting controls the maximum number of indexes that a rebalance rebuilds concurrently. You must have the Full Admin or the Cluster Admin role to set this value.

For an overview of rebalance as it affects the Index Service, including an overview of smart batching, see Rebalance.

Whether the size of index keys is unlimited.

• If true, index keys may have unlimited size.
• If false, the maximum size for index keys and array index keys is specified by indexer.settings.max_seckey_size and indexer.settings.max_array_seckey_size.

In Couchbase Server 6.5 and later, the Index Service does not need to restart when you update this setting.

Buffer pool block size.

Build batch size.

Whether to abort index compaction if it's still running after the end of the index compaction interval.

An interval, specifying how frequently the Index Service checks whether the compaction threshold has been reached (seconds).

The compaction mode for indexes.

The days of the week on which circular compaction is to run, if specified. Individual values must be day-names, each specified with an initial capital, and otherwise lower-case. Multiple values must be separated by a single comma, with no spaces.

A string in the form fromHour:fromMinute,toHour:toMinute, specifying the interval during which index compaction can run.

• fromHour — An integer between 0 and 23 inclusive, specifying the starting hour of the interval.
• fromMinute — An integer between 0 and 59 inclusive, specifying the starting minute of the interval, within the specified starting hour.
• toHour — An integer between 0 and 23 inclusive, specifying the concluding hour of the interval.
• toMinute — An integer between 0 and 59 inclusive, specifying the concluding minute of the interval, within the specified concluding hour.

The default value means any time.

The minimum fragmentation threshold to trigger compaction (percentage).

Compaction minimum file size.

For standard indexes using Plasma, whether compaction should be triggered manually.

For standard indexes using Plasma, the optional decrement.

For standard indexes using Plasma, the minimum fragmentation threshold to trigger compaction (percentage).

For standard indexes using Plasma, the optional quota.

Corrupt index number of backups.

The name of the directory where local CPU usage profiling information is captured.

Whether the Index Service should capture local CPU usage profiling information.

The default setting for the defer_build option for index creation.

• If this setting is true, and you create an index without specifying defer_build, the index is not built immediately.
• If this setting false, and you create an index without specifying defer_build, the index is built immediately.

You can override this setting by specifying the defer_build option when you create an index.

The ETag (entity tag) period.

Whether corrupt index backup is enabled.

Whether Bloom filters are enabled for memory management.

For more information, see Per Page Bloom Filters.

Selects the index rebalance method. See Index Rebalance Methods.

• If false (the default), Index Service nodes rebuild indexes that are newly assigned to them during a rebalance.

• If true, Couchbase Server moves a reassigned index's files between Index Service nodes.

If set to true, when you create an index, you can use the WITH clause to specify which node should contain the index. However, when you alter an index, you cannot use the WITH clause to specify which node should contain the index.

Whether fast flush mode is enabled.

Garbage collection percentage.

For standard indexes using Forestdb, the in-memory snapshot interval (ms). This determines the earliest possibility of a scan seeing a given KV mutation.

The in-memory snapshot interval (ms). This determines the earliest possibility of a scan seeing a given KV mutation.

For memory-optimized indexes, the in-memory snapshot interval (ms). This determines the earliest possibility of a scan seeing a given KV mutation.

The large snapshot threshold.

Indexer logging level.

Maximum number of partitions.

Maximum vBucket queue length.

If indexer.settings.allow_large_keys is false, this setting specifies the maximum size for array index keys.

In Couchbase Server 6.5 and later, the Index Service does not need to restart when you update this setting.

The CPU capacity that the Index Service should use (percentage). If set to 0, the indexer will use all CPUs.

If indexer.settings.allow_large_keys is false, this setting specifies the maximum size for index keys.

In Couchbase Server 6.5 and later, the Index Service does not need to restart when you update this setting.

Maximum writer lock prob.

The name of the directory where local memory usage profiling information is captured.

Whether the Index Service should capture local memory usage profiling information.

How much RAM is allocated to the Index Service for the current node.

Minimum vBucket queue length.

Debug memory-optimized index storage.

For memory-optimized index storage, the number of persistence threads.

For memory-optimized index storage, the maximum number of committed rollback points.

For memory-optimized index storage, the number of recovery threads.

The default number of index replicas to be created by the Index Service whenever CREATE INDEX is invoked.

Percentage memory quota.

For standard indexes using Forestdb, the persisted snapshot interval (ms). This must be a multiple of the in-memory snapshot interval.

The persisted snapshot interval (ms). This must be a multiple of the in-memory snapshot interval.

For memory-optimized indexes, the persisted snapshot interval (ms). This must be a multiple of the in-memory snapshot interval.

For standard indexes using Forestdb, the persisted snapshot interval for the initial build (ms).

The persisted snapshot interval for the initial build (ms).

For memory-optimized indexes, the persisted snapshot interval for the initial build (ms).

For standard indexes using Plasma, the maximum number of committed rollback points.

Rebalance blob storage bucket.

Rebalance blob storage prefix.

Rebalance blob storage region.

Rebalance blob storage scheme.

Whether to redistribute indexes on rebalance.

• When true, Couchbase Server redistributes indexes when rebalance occurs, in order to optimize performance.

• When false (the default), such redistribution does not occur.

For more information, see Rebalance.

The maximum number of committed rollback points.

Scan get sequence numbers retries.

The default timeout for the indexer, in milliseconds. This is distinct from the Query Service timeout. The Index Service has its own timeout because index scans consume resources such as memory and CPU while holding snapshots and performing range scan.

An index scan may time out if the Index Service timeout is lower than the Query Service timeout.

Send buffer size.

Serverless index limit.

Slice buffer size.

Small snapshot threshold.

Snapshot listeners.

Snapshot request workers.

Statistics log dump interval.

The storage mode to be used for the Index Service on this node.

If you're using Couchbase Server Enterprise Edition, the possible values are:

• plasma (the default) — Sets the index storage mode to use the Plasma storage engine, which can utilize both memory and persistent storage for index maintenance and index scans.

• memory_optimized — Sets the index storage mode to use memory optimized Global Secondary Indexes, which can perform index maintenance and index scan faster at in-memory speeds.

This setting can only be changed while there are no index nodes in the cluster. To change from standard GSI to memory optimized GSI or vice versa, you need to remove all the Index Service nodes in the cluster.

If you're using Couchbase Server Community Edition, the default (and only) value is forestdb.

Whether upgrade of the index storage mode is disabled.

High memory threshold.

Low memory threshold.

High units threshold.

Low units threshold.

Units quota.

Write-ahead log size.

Projector logging level.

The maximum size of the backfill file (MB).

• A value of 0 disables backfill.
• A value of -1 means the size is unlimited.

The maximum size is limited only by the available disk space.

Whether to close active connections.

Minimum pool size.

Maximum number of connections in a pool.

Number of simultaneous active connections in a pool.

Connection batch size.