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Adaptive flushing is enabled by setting innodb_max_dirty_pages_pct_lwm>0 (not default) and innodb_adaptive_flushing=ON (default). There is also the parameter innodb_adaptive_flushing_lwm (default: 10 per cent of the log capacity). It should enable some adaptive flushing even when innodb_max_dirty_pages_pct_lwm=0. That is not being changed here. This idea was first presented by Inaam Rana several years ago, and I discussed it with Jean-François Gagné at FOSDEM 2023. buf_flush_page_cleaner(): When we are not near the log capacity limit (neither buf_flush_async_lsn nor buf_flush_sync_lsn are set), also try to move clean blocks from the buf_pool.LRU list to buf_pool.free or initiate writes (but not the eviction) of dirty blocks, until the remaining I/O capacity has been consumed. buf_flush_LRU_list_batch(): Add the parameter bool evict, to specify whether dirty least recently used pages (from buf_pool.LRU) should be evicted immediately after they have been written out. Callers outside buf_flush_page_cleaner() will pass evict=true, to retain the existing behaviour. buf_do_LRU_batch(): Add the parameter bool evict. Return counts of evicted and flushed pages. buf_flush_LRU(): Add the parameter bool evict. Assume that the caller holds buf_pool.mutex and will invoke buf_dblwr.flush_buffered_writes() afterwards. buf_flush_list_holding_mutex(): A low-level variant of buf_flush_list() whose caller must hold buf_pool.mutex and invoke buf_dblwr.flush_buffered_writes() afterwards. buf_flush_wait_batch_end_acquiring_mutex(): Remove. It is enough to have buf_flush_wait_batch_end(). page_cleaner_flush_pages_recommendation(): Avoid some floating-point arithmetics. buf_flush_page(), buf_flush_check_neighbor(), buf_flush_check_neighbors(), buf_flush_try_neighbors(): Rename the parameter "bool lru" to "bool evict". buf_free_from_unzip_LRU_list_batch(): Remove the parameter. Only actual page writes will contribute towards the limit. buf_LRU_free_page(): Evict freed pages of temporary tables. buf_pool.done_free: Broadcast whenever a block is freed (and buf_pool.try_LRU_scan is set). buf_pool_t::io_buf_t::reserve(): Retry indefinitely. During the test encryption.innochecksum we easily run out of these buffers for PAGE_COMPRESSED or ENCRYPTED pages. Tested by Matthias Leich and Axel Schwenke |
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| btr | ||
| buf | ||
| data | ||
| dict | ||
| eval | ||
| fil | ||
| fsp | ||
| fts | ||
| fut | ||
| gis | ||
| ha | ||
| handler | ||
| ibuf | ||
| include | ||
| lock | ||
| log | ||
| mem | ||
| mtr | ||
| mysql-test/storage_engine | ||
| os | ||
| page | ||
| pars | ||
| que | ||
| read | ||
| rem | ||
| row | ||
| srv | ||
| sync | ||
| trx | ||
| unittest | ||
| ut | ||
| .clang-format-old | ||
| bzip2.cmake | ||
| CMakeLists.txt | ||
| COPYING.Google | ||
| COPYING.Percona | ||
| lz4.cmake | ||
| lzma.cmake | ||
| lzo.cmake | ||
| snappy.cmake | ||