diff options
Diffstat (limited to 'innobase')
| -rw-r--r-- | innobase/trx/trx0purge.c | 24 |
1 files changed, 0 insertions, 24 deletions
diff --git a/innobase/trx/trx0purge.c b/innobase/trx/trx0purge.c index 6726d7ca609..5c62640e011 100644 --- a/innobase/trx/trx0purge.c +++ b/innobase/trx/trx0purge.c @@ -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); |