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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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9
server/core/maxscale/config.h
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@ -22,10 +22,11 @@
MXS_BEGIN_DECLS
#define DEFAULT_NBPOLLS 3 /**< Default number of non block polls before we block */
#define DEFAULT_POLLSLEEP 1000 /**< Default poll wait time (milliseconds) */
#define DEFAULT_NTHREADS 1 /**< Default number of polling threads */
#define DEFAULT_QUERY_RETRIES 0 /**< Number of retries for interrupted queries */
#define DEFAULT_NBPOLLS 3 /**< Default number of non block polls before we block */
#define DEFAULT_POLLSLEEP 1000 /**< Default poll wait time (milliseconds) */
#define DEFAULT_NTHREADS 1 /**< Default number of polling threads */
#define DEFAULT_QUERY_RETRIES 0 /**< Number of retries for interrupted queries */
#define DEFAULT_QUERY_RETRY_TIMEOUT 5 /**< Timeout for query retries */
/**
* @brief Generate default module parameters