wip: customise full text indexation

actually we index almost everything in fulltext, if we updates and delete many times,like 160K SQLCatalog_deferFullTextIndexActivity, we may have

...
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x7f8028010170): REPLACE INTO
  full_text
VALUES
    ( 
  1385784,
  '52'
),    ( 
  2408896,
  '14'
),    ( 
  1385747,
  '89'
),    ( 
  1385758,
  '78'
),    ( 
  1385792,
  '44'
),    ( 
  1385766,
  '70'
),    ( 
  1385737,
  '99'
),    ( 
  1385739,
  '97'
),    ( 
  1385786,
  '50'
),    ( 
  1385740,
  '96'
),    ( 
  1385787,
  '49'
),    ( 
  1385785,
  '51'
),    ( 
  1385745,
  '91'
),    ( 
  1385742,
  '94'
),    ( 
  2408752,
  '158'
),    ( 
  2408759,
  '151'
),    ( 
  2408747,
  '163'
),    ( 
  2408750,
  '160'
),    ( 
  2408756,
  '154'
),    ( 
  1385752,
  '84'
),    ( 
  1385762,
  '74'
),    ( 
  1385793,
  '43'
),    ( 
  1386192,
  '244'
),    ( 
  1385749,
  '87'
),    ( 
  2408742,
  '168'
),    ( 
  1385776,
  '60'
),    ( 
  2408766,
  '144'
),    ( 
  2408753,
  '157'
),    ( 
  2408748,
  '162'
),    ( 
  2408764,
  '146'
),    ( 
  1385768,
  '68'
),    ( 
  2408755,
  '155'
),    ( 
  1385757,
  '79'
),    ( 
  1385759,
  '77'
),    ( 
  2408754,
  '156'
),    ( 
  2408893,
  '17'
),    ( 
  1385829,
  '7'
),    ( 
  1385770,
  '66'
),    ( 
  2408767,
  '143'
),    ( 
  2408770,
  '140'
),    ( 
  1385744,
  '92'
),    ( 
  1385827,
  '9'
),    ( 
  1385777,
  '59'
),    ( 
  2408744,
  '166'
),    ( 
  1385738,
  '98'
),    ( 
  1385764,
  '72'
),    ( 
  1385771,
  '65'
),    ( 
  1385780,
  '56'
),    ( 
  1385774,
  '62'
),    ( 
  1385751,
  '85'
),    ( 
  1385763,
  '73'
),    ( 
  2408763,
  '147'
),    ( 
  2408758,
  '152'
),    ( 
  1385789,
  '47'
),    ( 
  2408895,
  '15'
),    ( 
  1385794,
  '42'
),    ( 
  1385773,
  '63'
),    ( 
  1385781,
  '55'
),    ( 
  1385765,
  '71'
),    ( 
  2408757,
  '153'
),    ( 
  1385775,
  '61'
),    ( 
  1385772,
  '64'
),    ( 
  1385767,
  '69'
),    ( 
  1385741,
  '95'
),    ( 
  2408769,
  '141'
),    ( 
  1385791,
  '45'
),    ( 
  1385828,
  '8'
),    ( 
  2408765,
  '145'
),    ( 
  1385790,
  '46'
),    ( 
  2408771,
  '139'
),    ( 
  2408745,
  '165'
),    ( 
  2408760,
  '150'
),    ( 
  1385743,
  '93'
),    ( 
  1385760,
  '76'
),    ( 
  1385753,
  '83'
),    ( 
  2408768,
  '142'
),    ( 
  2408749,
  '161'
),    ( 
  1385830,
  '6'
),    ( 
  1385754,
  '82'
),    ( 
  1385750,
  '86'
),    ( 
  1385746,
  '90'
),    ( 
  1385778,
  '58'
),    ( 
  1385783,
  '53'
),    ( 
  1385755,
  '81'
),    ( 
  1385769,
  '67'
),    ( 
  2408751,
  '159'
),    ( 
  1385761,
  '75'
),    ( 
  1385782,
  '54'
),    ( 
  2408894,
  '16'
),    ( 
  1385756,
  '80'
),    ( 
  2408746,
  '164'
),    ( 
  1385788,
  '48'
),    ( 
  2408743,
  '167'
),    ( 
  1385836,
  'Blue-P3 1000074'
),    ( 
  1385779,
  '57'
),    ( 
  1385831,
  '5'
),    ( 
  2408741,
  '169'
),    ( 
  2408761,
  '149'
),    ( 
  2408762,
  '148'
),    ( 
  1385748,
  '88'
)

Connection ID (thread ID): 54
Status: NOT_KILLED

Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on

The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mariadbd/ contains
information that should help you find out what is causing the crash.
Writing a core file...
Working directory at /srv/slapgrid/slappart8/srv/runner/instance/slappart3/srv/mariadb
Resource Limits:
....

which make mariadb unavailable

to avoid this, let's first not index needless full text