Hi John, Thanks for your help. I have another doubt? If I turn off the sql compiler, should I have to fix my insert,delete,select,update operations? My operations are almost fixed in nature. Can you tell me how exactly I do this?
-----Original Message----- From: John Stanton [mailto:[EMAIL PROTECTED] Sent: Thursday, November 30, 2006 11:26 PM To: sqlite-users@sqlite.org Subject: Re: [sqlite] Query on database operations. You might find that a version of Sqlite which omits the compiler might fit your application. You get a smaller footprint, but at the cost of having to use pre-compiled SQL, which means that you cannot dynamically create SQL. Kalyani Tummala wrote: > Hi, > > This mail is a bit lengthy. I thank you in advance for your patience and > help:-). > > > > Here we go...... > > > > I need to port sqlite to a platform where the RAM size is too small > about 512kb. For that I need to tune sqlite to make its footprint, heap > and stack memory as small as possible. > > > > As said in the documentation on sqlite.org, I could get the least > possible footprint of 170KB with all the optional features turned off. > > > > My Analysis of heap and stack usage is as follows. > > > > Stack memory is consistent about 9-10K > > > > Heap memory is highly variant on size and number of records. I tried > modifying the page size(SQLITE_DEFAULT_PAGE_SIZE and > SQLITE_MAX_PAGE_SIZE ) in pager.h from 512 to 2048 but found no > reduction in heap size. > > > > With indexes on every column(searched), the following is the heap size > for different database operations on a database with 100 records and 6 > tables with an avg of 10 to 15 fields each. > > > > Operation MAX Heap > Average Heap(Bytes) > > insertion > > 85939 > > 24166 > > deletion > > 397834 > > 76541 > > Selection of all records > > 246973 > > 79075 > > Update of all records > > 249808 > > 196334 > > > > It seems quite a huge heap consumption. Are these numbers as expected? > Is there a way that I can reduce these numbers in the range of 40-50kB > by any means (including accessing pattern). > > > > I would like to know the reason for high heap consumption for deletion > operation. > > > > Thanks in advance. > > Kalyani > > > > > > > ********************************************************************** > This email and any files transmitted with it are confidential and > intended solely for the use of the individual or entity to whom they > are addressed. If you have received this email in error please notify > [EMAIL PROTECTED] > ********************************************************************** > > ------------------------------------------------------------------------ ----- To unsubscribe, send email to [EMAIL PROTECTED] ------------------------------------------------------------------------ ----- ----------------------------------------------------------------------------- To unsubscribe, send email to [EMAIL PROTECTED] -----------------------------------------------------------------------------
