Posted by peter |
… to hack wordpress to support eaccelerator
cache or memcached. Well honestly speaking if …_type to “DEMAND” and use only
SQL_
CACHE hint for queries which you…whole objects rather than individual queries.
No control on invalidation Table granularity is…
Posted by peter |
… performance bottleneck, assuming PHP opcode
cache is not used. Also different…tuning ? Not surpising associative array
cache performs the best, almost 4…good way to go.
File
Cache is good for long term…good when there is
no other
cache If you do not…
Posted by
peter @ 8:00 am ::
lamp ::
Posted by Alexey Kovyrin |
…c LIMIT 5;
Results with
SQL_CALC_FOUND_ROWS are following…separate queries:
mysql> SELECT
SQL_
NO_
CACHE * FROM count_test WHERE…at EXPLAINs:
mysql> explain SELECT
SQL_CALC_FOUND_ROWS * FROM count…b>
1.8 seconds for
SQL_CALC_FOUND_ROWS.
1.8…
Posted by peter |
…), allocating key_
cache proportional to their size and load, but
no more than … table_name in (”a”,”b”);
+——————————————————————————————-+
| concat(”
CACHE INDEX “,table_schema,”.”,table_name,” IN…
Posted by peter |
… this “I’m using
SQL_
NO_
CACHE but my query is … buffers. There is also table_
cache both MySQL side and Internal…only lightly, the hardware IO
cache may however cause dramatic difference…course to reboot.
For Hardware
Caches it is more hardware specific…
Posted by Baron Schwartz |
…be satisfied from the operating system
cache, or whether it’ll have to…run for days and never complete.
No one ever let it finish to… instead of being read from
cache. Now the STRAIGHT_JOIN becomes … of knowledge about the OS
cache. This is why an expert …
Posted by Maciej Dobrzanski |
…
patching file
sql/slave.cc
patching file
sql/
sql_
cache.cc
…should be now available in
sql subdirectory:
(garfield:~/work/mysql-5…mysql-5.0.51a) % strip
sql/mysqld
(garfield:~/work/mysql-5…most convenient time, there is
no rush. The restart can take…
Posted by
Maciej Dobrzanski @ 5:38 am ::
patch ::
Posted by peter |
…on data conversion and copying
Avoid
SQL Injection
Save memory on handling blobs… of using prepared statements:
Query
cache does not work
Extra server round…
Few notes:
There is
no statement
cache – You can allocate multiple …
Posted by Antony Curtis |
… better is for someone to go into the
sql_
cache.cc and remove the silly “mutex … it, just a single trylock and if
no joy, proceed as if there is a
cache miss. The spin is very expensive as it… the code has lasted this long with
no one allowed to clean it up)
Posted by
Antony Curtis @ 8:39 pm ::
tips ::
Posted by Robert Hodges |
… data to be replicated with index and metadata stored in
SQL types, hence exactly what you recommend. I have used …, and is a good reason to go for a
No-
SQL solution or start figuring out to
cache more effectively within process memory. We are looking at …
Posted by
Robert Hodges @ 1:13 pm ::
mysql,
tips ::
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