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MXS-1367: Add timeouts for retried queries

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The total timeout for the retrying of interrupted queries can now be
configured with the `query_retry_timeout` parameter. It controls the total
timeout in seconds that the query can take.

The actual connection, read and write timeouts of the connector aren't a
good configuration value to use for abstracted queries as the time that it
takes to execute a query can be composed of both connections, reads and
writes. This is caused by the usage of MYSQL_OPT_RECONNECT that hides the
fact that the connector reconnects to the server when a query is
attempted.
This commit is contained in:
Markus Mäkelä
2017-10-03 11:12:45 +03:00
parent 67ef7bd058
commit 9280f1a5d7
6 changed files with 38 additions and 7 deletions
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15
server/core/config.c
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@ -1319,6 +1319,20 @@ handle_global_item(const char *name, const char *value)
return 0;
}
}
else if (strcmp(name, "query_retry_timeout") == 0)
{
char* endptr;
int intval = strtol(value, &endptr, 0);
if (*endptr == '\0' && intval > 0)
{
gateway.query_retries = intval;
}
else
{
MXS_ERROR("Invalid timeout value for 'query_retry_timeout': %s", value);
return 0;
}
}
else if (strcmp(name, "log_throttling") == 0)
{
if (*value == 0)
@ -1606,6 +1620,7 @@ global_defaults()
gateway.auth_write_timeout = DEFAULT_AUTH_WRITE_TIMEOUT;
gateway.skip_permission_checks = false;
gateway.query_retries = DEFAULT_QUERY_RETRIES;
gateway.query_retry_timeout = DEFAULT_QUERY_RETRY_TIMEOUT;
if (version_string != NULL)
{