Ce diaporama a bien été signalé.
Nous utilisons votre profil LinkedIn et vos données d’activité pour vous proposer des publicités personnalisées et pertinentes. Vous pouvez changer vos préférences de publicités à tout moment.

About MySQL sync_binlog

1 016 vues

Publié le

Publié dans : Technologie
  • I have done a couple of papers through ⇒⇒⇒WRITE-MY-PAPER.net ⇐⇐⇐ they have always been great! They are always in touch with you to let you know the status of paper and always meet the deadline!
       Répondre 
    Voulez-vous vraiment ?  Oui  Non
    Votre message apparaîtra ici
  • If you are looking for trusted essay writing service I highly recommend ⇒⇒⇒WRITE-MY-PAPER.net ⇐⇐⇐ The service I received was great. I got an A on my final paper which really helped my grade. Knowing that I can count on them in the future has really helped relieve the stress, anxiety and workload. I recommend everyone to give them a try. You'll be glad you did.
       Répondre 
    Voulez-vous vraiment ?  Oui  Non
    Votre message apparaîtra ici
  • You can hardly find a student who enjoys writing a college papers. Among all the other tasks they get assigned in college, writing essays is one of the most difficult assignments. Fortunately for students, there are many offers nowadays which help to make this process easier. The best service which can help you is ⇒ www.HelpWriting.net ⇐
       Répondre 
    Voulez-vous vraiment ?  Oui  Non
    Votre message apparaîtra ici
  • Soyez le premier à aimer ceci

About MySQL sync_binlog

  1. 1. sync_binlog & max_binlog_size Dehua Yang 2012-10-09
  2. 2. sync_binlog• Where is the difference between 0,1?• sync_binlog=0 – MySQL just write the binlog into OS buffer – not use fdatasync(), – in high concurrent pressure, this value would impact performance when OS flush buffer into disk• sync_binlog=1 • Every sync_binlog writes to the binary log, MySQL will call the fdatasync() to synchronizes its binary log to disk (autocommit =true) • A value of 1 is the safest choice , but if MySQL cash, we still lose one binlog event. • If have a raid battery-backed cache, which makes synchronization very fast
  3. 3. max_binlog_size• Default value is 100M• Sometimes we would see some binlog file excee the value of max_binlog_size• Because... – Your binlog format is RBR – You have big transcation , and MySQL woundn’t split one transcation into serveral binary logs.

×