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2005
:
Would you please give me some notes for DB design?
Answer:
System Structure: This requirement is configured almost same as others. You need to consider: (1) Using 3-tier or Server/Client to reduce the loading of Database Server, (2) Using ...
2005
:
How does the inside of the DBMaker deal with when insert BLOB data repeatedly? Does
Answer:
DBMaker will store only a single LO and share it between the tuples, If the same LO data is contained in many tuples. But that ...
2006
:
What is the limitation to the number of the command handles when using JDBC data
Answer:
At present (DBMaster 4.16/4.20), DBMaker allows the maximum of the command handles is 257. But after 4.21, 4.22, 4.3 and later version, customer can set ...
2006
:
When I try to connect to the DB server with the dmSQL tool, why it
Answer:
It is not the memory‘s business, Please set keyword DB_SVADR for this database. For example: DB_SVADR=192.168.0.170; That will be ok. ...
2007
:
Why the memory occupation reduced when minimized the dmserver window in Windows Platform? (From 1748)
Answer:
It should be windows’ behavior. Not only the dmserver can show the phenomenon, other applications such as Outlook or IE can also show the phenomenon. ...
2007
:
How to make effective use of memory, does it need changing some settings? (From DBMR
Answer:
There are many factors effect performance, such as Hardware, OS, Database system, Application system. For database factors, there are also many factors. Performance is decided by ...
2007
:
What kind of action use memory space other than DCCA? (From DBMR 1839)
Answer:
Each connection will be allocated one private memory not in DCCA but on DB Server side to save private data, such as sort data. ITT is ...
2008
:
There are the following statements: On the machine the database was last started from before it
Answer:
ipcs:check the shared memory allocation on a systemipcrm:manually deallocate shared memory on a system When removing the shared memory, please use shmid (SharedMemory ID). After some ...
2008
:
What is the file databasename.pid used for? (DBMR1955; version: DBMaker4.3)
Answer:
File DBName.pid keeps dmserver running process id. It's for using ‘dmserver –k’ to shutdown database, we need to know which process id is catched by dmserver, ...
2009
:
What does the ITT stand for and what's the correct range of values for it?
Answer:
ITT -- Internal Temporary Table: for sorting/ordering table in table join, select ... order by, etc. ITT uses physical memory, not use the DCCA. DBMaker has ...
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