[sqlite] sqlite 3.8.11 - binary size
Hi, I am running sqlite3 v3.8.10 on an ARM Cortex-M4 based embedded system. The minimal size I could achieve was 184 K. Do you really have 44.8 K? And how much runtime RAM is used by your binary? My RAM usage is 72-74 K. 2015-10-22 10:51 GMT+02:00 Romain Crausaz : > Dear, > > We have an embedded system using sqlite. I performed an update from > version 3.7.11 to 3.8.11 and was surprized that the binary file sqlite3 has > grown from 44.8 KB to 627.4 KB. I used the same configuration (default) for > both cross-compilation. > > The system has a limited amount of NAND memory and this make it unusable > in our case. > > Is this memory increase normal or am I doing something wrong ? > > The library size didn't increase. It is only the sqlite3 binary file. > > Best regards > Romain Crausaz > > ___ > sqlite-users mailing list > sqlite-users at mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users >
[sqlite] vdbeUnbind return occasionally Error
thanks for the hint. I've tried with SQLITE_ENABLE_MEMORY_MANAGEMENT to call sqlite3_release_memory() each time after sqlite3_step(). The memory usage is different during the whole runtime of the device. At the beginning it is 80 K and each time the released memory ranges from 0 to 1,7 K, only once or twice 3,5 K was released. the highest memory usage was 86 K. But anyway, despite of memory release, each time after power up there can be executed only 450-500 inserts, then NOMEM is returned, but SQLite memory usage at that time is only 82 K. Maybe the memory is wasted for other things and is not released properly. Any hints to this problem would be very appreciated. Kind Regards 2015-09-21 14:42 GMT+02:00 Richard Hipp : > On 9/21/15, Shuhrat Rahimov wrote: > > What could I do here in order to free > > memory after sqlite3_step() for further operations. > > https://www.sqlite.org/c3ref/db_release_memory.html > > -- > D. Richard Hipp > drh at sqlite.org > ___ > sqlite-users mailing list > sqlite-users at mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users >
[sqlite] vdbeUnbind return occasionally Error
Hello Richard, thanks for your reply. I think I have found the problem. I do the following: call sqlite3_bind_text() and then if successful I call sqlite3_step() on the prepared statement and then call sqlite3_reset(). This sequence is called 20 times as one SQL transaction. I have noticed that the problem occurs after about 20 transactions since power on. I have noticed that before sqlite3_bind_text() returns Error 21, the sqlite3_step() returns NO_MEM error. So, here maybe I am simply running out of RAM. I have only 160 K of RAM. What could I do here in order to free memory after sqlite3_step() for further operations. Regards 2015-09-21 14:08 GMT+02:00 Richard Hipp : > On 9/21/15, Shuhrat Rahimov wrote: > > Hi all, > > I have ported SQLite to an embedded ARM Cortex M4 based processor. a bare > > metal firmware is using SQLite, no OS. It seems to work but occasionaly > > bindText function fails. So, I am doing 20 inserts as a one transaction, > > but occasionally after 400-460 inserts bindText returns Error 21. I have > > seen that it is occuring in vdbeUnbind function, log is: "bind on a busy > > prepared statement". Could you help me to find out what the problem can > be? > > The prepared statement is still in use when you try to call > sqlite3_bind_text(). You can see this by adding "assert( > sqlite3_stmt_busy(pStmt) );" right before you call > sqlite3_bind_text(pStmt,...). This is an application-level error, not > a problem with SQLite or your port. > > You need to invoke sqlite3_reset() on a prepared statement that has > been previously used before you run sqlite3_bind_text() on that > prepared statement. > > -- > D. Richard Hipp > drh at sqlite.org > ___ > sqlite-users mailing list > sqlite-users at mailinglists.sqlite.org > http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users >
[sqlite] vdbeUnbind return occasionally Error
Hi all, I have ported SQLite to an embedded ARM Cortex M4 based processor. a bare metal firmware is using SQLite, no OS. It seems to work but occasionaly bindText function fails. So, I am doing 20 inserts as a one transaction, but occasionally after 400-460 inserts bindText returns Error 21. I have seen that it is occuring in vdbeUnbind function, log is: "bind on a busy prepared statement". Could you help me to find out what the problem can be? Regards
[sqlite] VFS for an MCU internal flash
Hello, I was trying to run SQLite on ARM Cortex M4 CPU. What I need is a minimal SQLite without the most features. I have no file system, so I wanted to save a single file db on the internal MCU flash. I have successfully cross compiled SQLite for ARM Cortex M4. I have set among others compile time options SQLITE_OS_OTHER=1 and SQLITE_THREADSAFE=0. Now I wanted to implement a VFS. I want to save db tables directly in internal flash without a file system. I have difficulties to understand test_onefile.c implementation provided by SQLite. How could I edit that file in order to be able to write file content on the internal MCU flash? Please, could someone explain it to me or give some links where it is explained? Kind Regards
