Changed default value for and clarified '[PSG] max_concurrent_streams'. JIRA CXX-14255

Author: Rafael Sadyrov

pages/ch_libconfig.md

@@ -963,7 +963,7 @@ Table 13.6. psg_client library configuration parameters
 | How often to query LBSM while no servers discovered, in seconds. Less or equal to zero means `rebalance_time` is used instead                                                                                                                                     | **`[PSG]`**<br/>**`no_servers_retry_delay`**<br/><br/>**`NCBI_CONFIG__PSG__NO_SERVERS_RETRY_DELAY`**[<sup>a</sup>](#ch_libconfig.TF.psg_client_library.1)                                            | double                                                                    | 1.0                        |
 | Number of internal I/O threads. Each thread has one session (TCP connection) per server at start. New sessions are added dynamically (up to the 'max_sessions' limit, see below).                                                                                 | **`[PSG]`**<br/>**`num_io`**<br/><br/>**`NCBI_CONFIG__PSG__NUM_IO`**[<sup>a</sup>](#ch_libconfig.TF.psg_client_library.1)                                                                            | integer \>= 1                                                             | 1                          |
 | Max number of sessions (TCP connections) per server per I/O thread. Each thread has one session per server at start. New sessions are added dynamically (up to the limit) if all existing ones are full. For a single-server service the limit is at least 2.     | **`[PSG]`**<br/>**`max_sessions`**<br/><br/>**`NCBI_CONFIG__PSG__MAX_SESSIONS`**[<sup>a</sup>](#ch_libconfig.TF.psg_client_library.1)                                                                | integer \>= 1                                                             | 1                          |
-| Maximum number of concurrent streams per session (TCP connection)                                                                                                                                                                                                 | **`[PSG]`**<br/>**`max_concurrent_streams`**<br/><br/>**`NCBI_CONFIG__PSG__MAX_CONCURRENT_STREAMS`**[<sup>a</sup>](#ch_libconfig.TF.psg_client_library.1)                                            | integer \>= 10                                                            | 100                        |
+| Maximum number of concurrent streams per session (TCP connection). This limit is automatically reduced to the server limit if the latter is lower.                                                                                                                | **`[PSG]`**<br/>**`max_concurrent_streams`**<br/><br/>**`NCBI_CONFIG__PSG__MAX_CONCURRENT_STREAMS`**[<sup>a</sup>](#ch_libconfig.TF.psg_client_library.1)                                            | integer \>= 10                                                            | 200                        |
 | Maximum number of concurrent submits per "on queue" callback. Essentially, maximum number of requests to be sent per one I/O operation.                                                                                                                           | **`[PSG]`**<br/>**`max_concurrent_submits`**<br/><br/>**`NCBI_CONFIG__PSG__MAX_CONCURRENT_SUBMITS`**[<sup>a</sup>](#ch_libconfig.TF.psg_client_library.1)                                            | integer \>= 1                                                             | 150                        |
 | Maximum number of concurrent requests per server.                                                                                                                                                                                                                 | **`[PSG]`**<br/>**`max_concurrent_requests_per_server`**<br/><br/>**`NCBI_CONFIG__PSG__MAX_CONCURRENT_REQUESTS_PER_SERVER`**[<sup>a</sup>](#ch_libconfig.TF.psg_client_library.1)                    | integer \>= 100                                                           | 500                        |
 | Number of requests to submit consecutively per I/O thread                                                                                                                                                                                                         | **`[PSG]`**<br/>**`requests_per_io`**<br/><br/>**`NCBI_CONFIG__PSG__REQUESTS_PER_IO`**[<sup>a</sup>](#ch_libconfig.TF.psg_client_library.1)                                                          | integer \>= 1                                                             | 1                          |