我的书签
添加书签
移除书签agent_persistent
agent_persistent
Persistently connected remote agent declaration. Multi-value, optional, default is empty. Introduced in version 2.1.1-beta.
agent_persistent directive syntax matches that of
the agent directive. The only difference
is that the master will not open a new connection to the agent for
every query and then close it. Rather, it will keep a connection open and
attempt to reuse for the subsequent queries. The maximal number of such persistent connections per one agent host
is limited by persistent_connections_limit option of searchd section.
Note, that you have to set the last one in something greater than 0 if you want to use persistent agent connections. Otherwise - when persistent_connections_limit is not defined, it assumes the zero num of persistent connections, and 'agent_persistent' acts exactly as simple 'agent'.
Persistent master-agent connections reduce TCP port pressure, and save on connection handshakes. As of time of this writing, they are supported only in workers=threads mode. In other modes, simple non-persistent connections (i.e., one connection per operation) will be used, and a warning will show up in the console.
Example:
agent_persistent = remotebox:9312:index2
