> ## Documentation Index
> Fetch the complete documentation index at: https://clickhouse.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# text_index_* server settings

> ClickHouse server settings in the text_index_* generated group.

These settings configure the ClickHouse server and are autogenerated from ClickHouse source.

## text\_index\_header\_cache\_max\_entries

Type UInt64 Default 100000 Changeable without restart NoSize of cache for text index header in entries. Zero means disabled.

## text\_index\_header\_cache\_policy

Type String Default SLRU Changeable without restart NoText index header cache eviction policy name. Possible values: `LRU`, `SLRU`, `SIEVE`.

## text\_index\_header\_cache\_size

Type UInt64 Default 1073741824 Changeable without restart YesSize of cache for text index headers. Zero means disabled.

> [!NOTE]
>
> This setting can be modified at runtime and will take effect immediately.

## text\_index\_header\_cache\_size\_ratio

Type Double Default 0.5 Changeable without restart NoThe size of the protected queue (in case of SLRU policy) in the text index header cache relative to the cache's total size.

## text\_index\_postings\_cache\_max\_entries

Type UInt64 Default 1000000 Changeable without restart NoSize of cache for text index posting list in entries. Zero means disabled.

## text\_index\_postings\_cache\_policy

Type String Default SLRU Changeable without restart NoText index posting list cache eviction policy name. Possible values: `LRU`, `SLRU`, `SIEVE`.

## text\_index\_postings\_cache\_size

Type UInt64 Default 2147483648 Changeable without restart YesSize of cache for text index posting lists. Zero means disabled.

> [!NOTE]
>
> This setting can be modified at runtime and will take effect immediately.

## text\_index\_postings\_cache\_size\_ratio

Type Double Default 0.5 Changeable without restart NoThe size of the protected queue (in case of SLRU policy) in the text index posting list cache relative to the cache's total size.

## text\_index\_tokens\_cache\_max\_entries

Type UInt64 Default 1000000 Changeable without restart NoSize of cache for text index tokens in entries. Zero means disabled.

## text\_index\_tokens\_cache\_policy

Type String Default SLRU Changeable without restart NoText index tokens cache eviction policy name. Possible values: `LRU`, `SLRU`, `SIEVE`.

## text\_index\_tokens\_cache\_size

Type UInt64 Default 1073741824 Changeable without restart YesSize of cache for text index tokens. Zero means disabled.

> [!NOTE]
>
> This setting can be modified at runtime and will take effect immediately.

## text\_index\_tokens\_cache\_size\_ratio

Type Double Default 0.5 Changeable without restart NoThe size of the protected queue (in case of SLRU policy) in the text index tokens cache relative to the cache's total size.