Thursday, July 20, 2006

SHOW INNODB STATUS: TRANSACTIONS


------------
TRANSACTIONS
------------
Trx id counter 4 4177811381
Purge done for trx's n:o < 4 4177810974 undo n:o < 0 0
History list length 68
Total number of lock structs in row lock hash table 0
LIST OF TRANSACTIONS FOR EACH SESSION:
MySQL thread id 6, query id 12052143 Has read all relay log; waiting for the slave I/O thread to update it
---TRANSACTION 4 4177811379, ACTIVE 0 sec, process no 1537, OS thread id 418595012843 committing



  • Purge done for trx's n:o - number of transactions to which a purge is done. Means gets rid of old transactions that are not needed anymore. *Look Tuning secion

  • History list length 68 - number of transaction in the undo space

  • Total number of lock structs in row lock hash table - not locked rows but structures which one row may have many of



Tuning


If you see a lot of "waiting in InnoDB queue" then tune innodb_thread_conccurency raise it higher - for my typical workloads, which a fast single statement transactions I allow the innodb kernel to have 32 threads at any given time

If you see a lot of "sleeping before joining InnoDB queue" then tune
innodb_thread_sleep_delay variable. Value is specified in microseconds. Innodb sleeps a thread before it starts to wait for entry into the queue. This is to avoid many threads going into the thread queue to make the most of innodb_thread_conccurency

2 comments:

Frankly Speaking! said...

Hi Dathan,

It was nice to meet you at MySQL Camp.

How many CPUs does the box has on which you have 32 threads?

Just curious.

Frank

sexy said...

情趣用品,情趣用品,情趣用品,情趣用品,情趣用品,情趣用品,情趣用品,情趣用品,情趣,情趣,情趣,情趣,情趣,情趣,情趣,情趣,按摩棒,跳蛋,充氣娃娃,情境坊歡愉用品,情趣用品,情人節禮物,情惑用品性易購

免費A片,AV女優,美女視訊,情色交友,免費AV,色情網站,辣妹視訊,美女交友,色情影片,成人影片,成人網站,A片,H漫,18成人,成人圖片,成人漫畫,情色網,日本A片,免費A片下載,性愛

A片,色情,成人,做愛,情色文學,A片下載,色情遊戲,色情影片,色情聊天室,情色電影,免費視訊,免費視訊聊天,免費視訊聊天室,一葉情貼圖片區,情色,情色視訊,免費成人影片,視訊交友,視訊聊天,視訊聊天室,言情小說,愛情小說,AIO,AV片,A漫,av dvd,聊天室,自拍,情色論壇,視訊美女,AV成人網,色情A片,SEX

情趣用品,A片,免費A片,AV女優,美女視訊,情色交友,色情網站,免費AV,辣妹視訊,美女交友,色情影片,成人網站,H漫,18成人,成人圖片,成人漫畫,成人影片,情色網


情趣用品,A片,免費A片,日本A片,A片下載,線上A片,成人電影,嘟嘟成人網,成人,成人貼圖,成人交友,成人圖片,18成人,成人小說,成人圖片區,微風成人區,成人文章,成人影城,情色,情色貼圖,色情聊天室,情色視訊,情色文學,色情小說,情色小說,臺灣情色網,色情,情色電影,色情遊戲,嘟嘟情人色網,麗的色遊戲,情色論壇,色情網站,一葉情貼圖片區,做愛,性愛,美女視訊,辣妹視訊,視訊聊天室,視訊交友網,免費視訊聊天,美女交友,做愛影片

av,情趣用品,a片,成人電影,微風成人,嘟嘟成人網,成人,成人貼圖,成人交友,成人圖片,18成人,成人小說,成人圖片區,成人文章,成人影城,愛情公寓,情色,情色貼圖,色情聊天室,情色視訊,情色文學,色情小說,情色小說,色情,寄情築園小遊戲,情色電影,aio,av女優,AV,免費A片,日本a片,美女視訊,辣妹視訊,聊天室,美女交友,成人光碟

情趣用品.A片,情色,情色貼圖,色情聊天室,情色視訊,情色文學,色情小說,情色小說,色情,寄情築園小遊戲,情色電影,色情遊戲,色情網站,聊天室,ut聊天室,豆豆聊天室,美女視訊,辣妹視訊,視訊聊天室,視訊交友網,免費視訊聊天,免費A片,日本a片,a片下載,線上a片,av女優,av,成人電影,成人,成人貼圖,成人交友,成人圖片,18成人,成人小說,成人圖片區,成人文章,成人影城,成人網站,自拍,尋夢園聊天室