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MXS-1503: Enable limited session command history

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Enabling the session command history but limiting it to a history of 50
commands allows reconnections for sessions that don't change the state too
often.

As pooled connections will exceed this limit quite fast, they are not able
to reconnect to servers once connections are lost. To solve this problem,
the session command history needs a compaction process that removes
redundant history.
This commit is contained in:
Markus Mäkelä
2018-03-28 13:49:38 +03:00
parent dd59e7181c
commit ce853d3f7f
3 changed files with 35 additions and 6 deletions
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4
server/modules/routing/readwritesplit/readwritesplit.cc
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@ -1502,8 +1502,8 @@ MXS_MODULE *MXS_CREATE_MODULE()
{"max_slave_replication_lag", MXS_MODULE_PARAM_INT, "-1"},
{"max_slave_connections", MXS_MODULE_PARAM_STRING, MAX_SLAVE_COUNT},
{"retry_failed_reads", MXS_MODULE_PARAM_BOOL, "true"},
{"disable_sescmd_history", MXS_MODULE_PARAM_BOOL, "true"},
{"max_sescmd_history", MXS_MODULE_PARAM_COUNT, "0"},
{"disable_sescmd_history", MXS_MODULE_PARAM_BOOL, "false"},
{"max_sescmd_history", MXS_MODULE_PARAM_COUNT, "50"},
{"strict_multi_stmt", MXS_MODULE_PARAM_BOOL, "false"},
{"strict_sp_calls", MXS_MODULE_PARAM_BOOL, "false"},
{"master_accept_reads", MXS_MODULE_PARAM_BOOL, "false"},