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Code Activity

Removed double records_in_range calls from multi_range_read_info_const

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This was to remove a performance regression between 10.3 and 10.4
In 10.5 we will have a better implementation of records_in_range
that will enable us to get more statistics.
This change was not done in 10.4 because the 10.5 will be part of
a larger change that is not suitable for the GA 10.4 version

Other things:
- Changed default handler block_size to 8192 to fix things statistics
  for engines that doesn't set the block size.
- Fixed a bug in spider when using multiple part const ranges
  (Patch from Kentoku)
This commit is contained in:
Monty
2020-03-13 15:28:42 +02:00
parent 96b472c0ae
commit 1242eb3d32
68 changed files with 656 additions and 505 deletions
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20
mysql-test/main/opt_trace_index_merge.result
View File

@ -323,7 +323,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
"using_mrr": false,
"index_only": false,
"rows": 2243,
"cost": 2862.1,
"cost": 2844.1,
"chosen": true
},
@ -337,7 +337,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
"using_mrr": false,
"index_only": false,
"rows": 2243,
"cost": 2862.1,
"cost": 2844.1,
"chosen": false,
"cause": "cost"
},
@ -352,7 +352,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
"using_mrr": false,
"index_only": false,
"rows": 2243,
"cost": 2862.1,
"cost": 2844.1,
"chosen": false,
"cause": "cost"
}
@ -501,7 +501,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
"using_mrr": false,
"index_only": true,
"rows": 2243,
"cost": 170.53,
"cost": 152.53,
"chosen": true
},
@ -515,13 +515,13 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
"using_mrr": false,
"index_only": true,
"rows": 2243,
"cost": 170.53,
"cost": 152.53,
"chosen": false,
"cause": "cost"
}
],
"index_to_merge": "key1",
"cumulated_cost": 170.53
"cumulated_cost": 152.53
},
{
@ -538,7 +538,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
"using_mrr": false,
"index_only": true,
"rows": 2243,
"cost": 170.53,
"cost": 152.53,
"chosen": true
},
@ -552,16 +552,16 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
"using_mrr": false,
"index_only": true,
"rows": 2243,
"cost": 170.53,
"cost": 152.53,
"chosen": false,
"cause": "cost"
}
],
"index_to_merge": "key3",
"cumulated_cost": 341.05
"cumulated_cost": 305.05
}
],
"cost_of_reading_ranges": 341.05,
"cost_of_reading_ranges": 305.05,
"use_roworder_union": true,
"cause": "always cheaper than non roworder retrieval",
"analyzing_roworder_scans":