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trx0purge.c:

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Remove duplicated innodb max purge lag code
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heikki@hundin.mysql.fi 2004-11-11 21:17:44 +02:00
parent 6f39bf2b9c
commit 38cae36c87
1 changed files with 0 additions and 24 deletions
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24
innobase/trx/trx0purge.c
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@ -1069,30 +1069,6 @@ trx_purge(void)
}
}
/* Determine how much data manipulation language (DML) statements
need to be delayed in order to reduce the lagging of the purge
thread. */
srv_dml_needed_delay = 0; /* in microseconds; default: no delay */
/* If we cannot advance the 'purge view' because of an old
'consistent read view', then the DML statements cannot be delayed.
Also, srv_max_purge_lag <= 0 means 'infinity'. */
if (srv_max_purge_lag > 0
&& !UT_LIST_GET_LAST(trx_sys->view_list)) {
float ratio = (float) trx_sys->rseg_history_len
/ srv_max_purge_lag;
if (ratio > ULINT_MAX / 10000) {
/* Avoid overflow: maximum delay is 4295 seconds */
srv_dml_needed_delay = ULINT_MAX;
} else if (ratio > 1) {
/* If the history list length exceeds the
innodb_max_purge_lag, the
data manipulation statements are delayed
by at least 5000 microseconds. */
srv_dml_needed_delay = (ulint) ((ratio - .5) * 10000);
}
}
purge_sys->view = read_view_oldest_copy_or_open_new(NULL,
purge_sys->heap);
mutex_exit(&kernel_mutex);