lp:~vlad-lesin/percona-server/5.1-gca-bug-1038940-table_cache_speed_up
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- Laurynas Biveinis (community): Needs Fixing
- Stewart Smith: Pending requested
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Diff: 441 lines (+185/-99)10 files modifiedPercona-Server/storage/myisam/ha_myisam.cc (+4/-0)
Percona-Server/storage/myisam/mi_close.c (+1/-1)
Percona-Server/storage/myisam/mi_dbug.c (+3/-3)
Percona-Server/storage/myisam/mi_keycache.c (+3/-3)
Percona-Server/storage/myisam/mi_open.c (+67/-13)
Percona-Server/storage/myisam/mi_panic.c (+92/-75)
Percona-Server/storage/myisam/mi_static.c (+1/-1)
Percona-Server/storage/myisam/myisamchk.c (+6/-0)
Percona-Server/storage/myisam/myisamdef.h (+3/-3)
Percona-Server/storage/myisam/myisampack.c (+5/-0)
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Branch information
- Owner:
- Vlad Lesin
- Status:
- Development
Recent revisions
- 510. By Vlad Lesin
-
Fix for bug #1038940.
As the number of open tables is increased, table lookup
(testing if a table is already open) and (in particular)
the case when a table is not open, became increasingly more
expensive.The problem was caused by the open table lookup mechanism,
which was based on traversing a linked list comparing the
file names.As the list was replaced by a hash table, the lookup
time dropped significantly when used on systems with
a large number of open tables.The original patch can be found here:
http://lists.mysql. com/commits/ 121507 - 505. By <email address hidden>
-
Merge lp:~laurynas-biveinis/percona-server/xtradb-multiple-bmp-files-51
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- lp:percona-server/5.5
