Experience Exchange Sever

January 20, 2010

Slow Mail flow?

Filed under: Exchange 2003, Mail flow — vijayarelangovan @ 10:29 pm

Would the Disk bottleneck affect the mail flow?

As well all know, yes that will “affect the slow or affect” the mail flow

Reason:

Every message that is received by an SMTP gateway is saved to a disk.

  • With a default message size of 50 KB, about 7 to 8 disk writes occur for each message processed by the SMTP gateway.
  • This behavior is expected. Generally, SMTP performs 7 disk writes for every message queued that is smaller than 32 KB.
  • An SMTP gateway’s write buffer is 32 KB. Therefore, messages that are larger than 32 KB require an additional disk write for every 32 KB.

For example, a 100-KB message requires 10 disk writes to save the message in the queue.than 1 GB of memory.

it is good to run EXTRA to check the disk bottleneck and blame the “Third party” with a proof J

Advertisements

Leave a Comment »

No comments yet.

RSS feed for comments on this post. TrackBack URI

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Blog at WordPress.com.

%d bloggers like this: