NAV Server Instance Configurations in NAV 2013

johanna

Dear All,

Could you give me detail usage & impact information, and best settings for best performance about :
1. Data Cache Size
The contextual size of the data cache.
Default : 9 (Range 1..20)

2. Max Concurrent Calls
The maximum number of concurrent client calls that can be active on this Microsoft Dynamics NAV Server instance.
Default: 40 (Range: 1 - 2,147,483,647)

3. Metadata Provider Cache Size
Specifies the number of objects that can be cached. Set this value to 0 to disable caching.
Default: 150 (Range: 0..100000)

4. Session Event Table Purge Frequency
Specifies the day of the week and the start time when the Session Event table is queried for purging. The day-of-the-week part of the value is an integer from 0 (Sunday) to 6 (Saturday). The time part of the value is a valid time of the day expressed in the format hh:mm, where hh is a value from 1 to 24.
Default: 0 6:00
That is, 6:00 a.m. on Sunday.

5. Session Event Table Retain Period
An integer value specifying how many months events in the Session Events table are retained.
Default: 3

6. SQL Command Timeout
The contextual timeout for a SQL command.
Default: 0:30:00

7. Chunk Size
The default size for a chunk of data that is transferred between Microsoft Dynamics NAV Server and the RoleTailored client, in kilobytes.
Default: 28 (Range: 4..80.

8. Compression Threshold
The threshold in memory consumption at which Microsoft Dynamics NAV Server starts compressing datasets, in kilobytes.
Default: 64 (Range: 16..2000)

9. Max Concurrent Connections
Specifies the maximum number of concurrent client connections that the current Microsoft Dynamics NAV Server instance accepts.
Default: 150 (Range: 1 - 2,147,483,647)
You can also use MaxValue as a value to indicate no limit.

10. Max Items in Object Graph
The maximum number of objects to serialize or deserialize.
Default: 512 (Range: 1 - 2,147,483,647)

11. Max Number of Orphaned Connections
Specifies the maximum number of orphaned connections to be kept alive simultaneously for the time that is specified by ReconnectPeriod.
A connection is said to be orphaned when the client is involuntarily disconnected from Microsoft Dynamics NAV Server.
Default: 20 (Range: 1 - 2,147,483,647)
You can also use MaxValue as a value to indicate no limit.

12. Max Upload Size
The maximum size of files that can be uploaded to or downloaded from Microsoft Dynamics NAV Server, in megabytes. Use this setting to avoid out-of-memory errors.
Default: 5 (Range 1..2047)

The environment is 300 concurrent users, 1 database server, and 5 terminal server (for middle and client).
The specification of database server and terminal server is like attachment.

1. With 300 concurent users, how many server for NAV Server instance is needed? How many users can be handled by 1 NAV Server instance?
2. Is the spesification of Terminal and DB Server appropriate for 300 concurrent users with database size approximately 500GB and approximately 4000 SO numbers with each has 10 SO lines?
3. What the appropriate setting in NAV Server instance (12 points above) and Virtual Memory to prevent user from blocked error, deadlock error, and freeze/hang situation when 300 concurrent users post or do something almost in the same time?


Please help. Thank you.