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39 lines
1.3 KiB
Markdown
39 lines
1.3 KiB
Markdown
---
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slug: /en/operations/system-tables/dns_cache
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---
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# dns_cache
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Contains information about cached DNS records.
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Columns:
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- `hostname` ([String](../../sql-reference/data-types/string.md)) — cached hostname
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- `ip_address` ([String](../../sql-reference/data-types/string.md)) — ip address for the hostname
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- `ip_family` ([Enum](../../sql-reference/data-types/enum.md)) — family of the ip address, possible values:
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- 'IPv4'
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- 'IPv6'
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- 'UNIX_LOCAL'
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- `cached_at` ([DateTime](../../sql-reference/data-types/datetime.md)) - when the record was cached
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**Example**
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Query:
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```sql
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SELECT * FROM system.dns_cache;
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```
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Result:
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| hostname | ip\_address | ip\_family | cached\_at |
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| :--- | :--- | :--- | :--- |
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| localhost | ::1 | IPv6 | 2024-02-11 17:04:40 |
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| localhost | 127.0.0.1 | IPv4 | 2024-02-11 17:04:40 |
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**See also**
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- [disable_internal_dns_cache setting](../../operations/server-configuration-parameters/settings.md#disable_internal_dns_cache)
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- [dns_cache_max_entries setting](../../operations/server-configuration-parameters/settings.md#dns_cache_max_entries)
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- [dns_cache_update_period setting](../../operations/server-configuration-parameters/settings.md#dns_cache_update_period)
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- [dns_max_consecutive_failures setting](../../operations/server-configuration-parameters/settings.md#dns_max_consecutive_failures)
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