> ## 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.

# distributed_replica_* session settings

> ClickHouse session settings in the distributed_replica_* generated group.

export const SettingsInfoBlock = ({type, default_value, changeable_without_restart}) => {
  return <div className="not-prose" style={{
    display: "flex",
    flexWrap: "wrap",
    alignItems: "baseline",
    columnGap: "0.5rem",
    rowGap: "0.125rem",
    margin: "0.375rem 0",
    fontSize: "0.8125rem",
    lineHeight: "1.125rem"
  }}>
      <div style={{
    fontWeight: 600,
    opacity: 0.72
  }}>Type</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{type}</div>
      <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>Default</div>
      <div style={{
    overflowWrap: "anywhere"
  }}>{default_value}</div>
      {changeable_without_restart && <div style={{
    fontWeight: 600,
    opacity: 0.72,
    marginInlineStart: "0.5rem"
  }}>
          Changeable without restart
        </div>}
      {changeable_without_restart && <div style={{
    overflowWrap: "anywhere"
  }}>
          {changeable_without_restart}
        </div>}
    </div>;
};

These settings are available in [system.settings](/docs/reference/system-tables/settings) and are autogenerated from [source](https://github.com/ClickHouse/ClickHouse/blob/master/src/Core/Settings.cpp).

<h2 id="distributed_replica_error_cap">
  distributed\_replica\_error\_cap
</h2>

<SettingsInfoBlock type="UInt64" default_value="1000" />

* Type: unsigned int
* Default value: 1000

The error count of each replica is capped at this value, preventing a single replica from accumulating too many errors.

See also:

* [load\_balancing](/docs/reference/settings/session-settings/load-balancing#load_balancing-round_robin)
* [Table engine Distributed](/docs/reference/engines/table-engines/special/distributed)
* [distributed\_replica\_error\_half\_life](/docs/reference/settings/session-settings/distributed-replica#distributed_replica_error_half_life)
* [distributed\_replica\_max\_ignored\_errors](/docs/reference/settings/session-settings/distributed-replica#distributed_replica_max_ignored_errors)

<h2 id="distributed_replica_error_half_life">
  distributed\_replica\_error\_half\_life
</h2>

<SettingsInfoBlock type="Seconds" default_value="60" />

* Type: seconds
* Default value: 60 seconds

Controls how fast errors in distributed tables are zeroed. If a replica is unavailable for some time, accumulates 5 errors, and distributed\_replica\_error\_half\_life is set to 1 second, then the replica is considered normal 3 seconds after the last error.

See also:

* [load\_balancing](/docs/reference/settings/session-settings/load-balancing#load_balancing-round_robin)
* [Table engine Distributed](/docs/reference/engines/table-engines/special/distributed)
* [distributed\_replica\_error\_cap](/docs/reference/settings/session-settings/distributed-replica#distributed_replica_error_cap)
* [distributed\_replica\_max\_ignored\_errors](/docs/reference/settings/session-settings/distributed-replica#distributed_replica_max_ignored_errors)

<h2 id="distributed_replica_max_ignored_errors">
  distributed\_replica\_max\_ignored\_errors
</h2>

<SettingsInfoBlock type="UInt64" default_value="0" />

* Type: unsigned int
* Default value: 0

The number of errors that will be ignored while choosing replicas (according to `load_balancing` algorithm).

See also:

* [load\_balancing](/docs/reference/settings/session-settings/load-balancing#load_balancing-round_robin)
* [Table engine Distributed](/docs/reference/engines/table-engines/special/distributed)
* [distributed\_replica\_error\_cap](/docs/reference/settings/session-settings/distributed-replica#distributed_replica_error_cap)
* [distributed\_replica\_error\_half\_life](/docs/reference/settings/session-settings/distributed-replica#distributed_replica_error_half_life)