Sergey Anohin написал(а) к Dmitri Kamenski в May 17 14:12:57 по местному времени:

Нello Dmitri* *Kamenski
DK> Мало. У меня мать больше 4гиг не умеет. А на данный момент вообще 3.

У меня тоже до 4х, но у меня 4. У меня еще ZFS жpет не кисло. И баз много:
# du -hxs /usr/local/mysql
23G /usr/local/mysql

Коpоче я думаю что тут ваpиантов мало, или убиpать пул InnoDB в pаму (то есть наpащивать pаму как-то) и делать как тюнеp хочет или SSD.

Вот у меня такая печалька:

-------- Performance Metrics -----------------------------------------------------------------------
[--] Up for: 1d 20h 13m 5s (682K q [4.288 qps], 12K conn, TX: 1G, RX: 868M)
[--] Reads / Writes: 65% / 35%
[--] Binary logging is disabled
[--] Physical Memory : 3.9G
[--] Max MySQL memory : 5.5G
[--] Other process memory: 1016.0M
[--] Total buffers: 1.2G global + 54.3M per thread (80 max threads)
[--] P_S Max memory usage: 0B
[--] Galera GCache Max memory usage: 0B
[OK] Maximum reached memory usage: 3.2G (80.38% of installed RAM)
[!!] Maximum possible memory usage: 5.5G (139.74% of installed RAM)
[!!] Overall possible memory usage with other process exceeded memory
[OK] Slow queries: 0% (3K/682K)
[OK] Нighest usage of available connections: 45% (36/80)
[OK] Aborted connections: 0.76% (96/12649)
[!!] name resolution is active : a reverse name resolution is made for each new connection and can reduce performance
[!!] Query cache may be disabled by default due to mutex contention.
[OK] Query cache efficiency: 40.0% (213K cached / 532K selects)
[OK] Query cache prunes per day: 0
[OK] Sorts requiring temporary tables: 0% (0 temp sorts / 1K sorts)
[!!] Joins performed without indexes: 9954
[OK] Temporary tables created on disk: 0% (109 on disk / 14K total)
[OK] Thread cache hit rate: 99% (53 created / 12K connections)
[!!] Table cache hit rate: 19% (127 open / 662 opened)
[OK] Open file limit used: 0% (116/32K)
[OK] Table locks acquired immediately: 99% (307K immediate / 307K locks)

-------- Performance schema ------------------------------------------------------------------------
[--] Performance schema is disabled.
[--] Memory used by P_S: 0B
[--] Sys schema isn't installed.

-------- ThreadPool Metrics ------------------------------------------------------------------------
[--] ThreadPool stat is enabled.
[--] Thread Pool Size: 2 thread(s).
[--] Using default value is good enough for your version (10.1.21-MariaDB)

-------- MyISAM Metrics ----------------------------------------------------------------------------
[!!] Key buffer used: 18.1% (54M used / 301M cache)
[OK] Key buffer size / total MyISAM indexes: 288.0M/102.2M
[OK] Read Key buffer hit rate: 99.7% (198K cached / 514 reads)
[!!] Write Key buffer hit rate: 46.5% (10K cached / 4K writes)

-------- InnoDB Metrics ----------------------------------------------------------------------------
[--] InnoDB is enabled.
[--] InnoDB Thread Concurrency: 0
[OK] InnoDB File per table is activated
[!!] InnoDB buffer pool / data size: 640.0M/17.5G
[!!] Ratio InnoDB log file size / InnoDB Buffer pool size (15 %): 48.0M * 2/640.0M should be equal 25%
[OK] InnoDB buffer pool instances: 1
[--] InnoDB Buffer Pool Chunk Size not used or defined in your version
[OK] InnoDB Read buffer efficiency: 99.10% (946887893 hits/ 955529344 total)
[OK] InnoDB Write log efficiency: 99.35% (36809628 hits/ 37049700 total)
[OK] InnoDB log waits: 0.00% (0 waits / 240072 writes)

-------- AriaDB Metrics ----------------------------------------------------------------------------
[--] AriaDB is enabled.
[OK] Aria pagecache size / total Aria indexes: 128.0M/16.1M
[!!] Aria pagecache hit rate: 93.7% (36K cached / 2K reads)

-------- TokuDB Metrics ----------------------------------------------------------------------------
[--] TokuDB is disabled.

-------- XtraDB Metrics ----------------------------------------------------------------------------
[--] XtraDB is disabled.

-------- RocksDB Metrics ---------------------------------------------------------------------------
[--] RocksDB is disabled.

-------- Spider Metrics ----------------------------------------------------------------------------
[--] Spider is disabled.

-------- Connect Metrics ---------------------------------------------------------------------------
[--] Connect is disabled.

-------- Galera Metrics ----------------------------------------------------------------------------
[--] Galera is disabled.

-------- Replication Metrics -----------------------------------------------------------------------
[--] Galera Synchronous replication: NO
[--] No replication slave(s) for this server.
[--] This is a standalone server.

-------- Recommendations ---------------------------------------------------------------------------
General recommendations:
Control warning line(s) into /var/db/mysql/server.err file
Control error line(s) into /var/db/mysql/server.err file
Reduce your overall MySQL memory footprint for system stability
Dedicate this server to your database for highest performance.
Configure your accounts with ip or subnets only, then update your configuration with skip-name-resolve=1
Adjust your join queries to always utilize indexes
Increase tableopencache gradually to avoid file descriptor limits
Read this before increasing tableopencache over 64: http://bit.ly/1mi7c4C
Beware that openfileslimit (32768) variable
should be greater than tableopencache (192)
Performance should be activated for better diagnostics
Consider installing Sys schema from https://github.com/mysql/mysql-sys
Variables to adjust:
** MySQL's maximum memory usage is dangerously high **
** Add RAM before increasing MySQL buffer variables **
querycachesize (=0)
querycachetype (=0)
joinbuffersize (> 32.0M, or always use indexes with joins)
tableopencache (> 192)
performance_schema = ON enable PFS
innodbbuffer_poolsize (>= 17G) if possible.
innodblog_file_size * innodb_log_files_ingroup should be equals to 1/4 of buffer pool size (=320M) if possible.


Bye, Dmitri Kamenski, 04 мая 17
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