...After a while, the cursor read process becomes very slow'. I guess that...DB_NEXT flag (sequence scan?) to the cursor and keep reading until finished. ... for your application, reading sequentially through an entire database? Because we are... that is leaking. Are all cursors closed when finished, and temporary .... Run these after the program slows down. The output can be ...

Very strange! I simply read through the data file (use std::ifstream) before I retieve data through cursor, it becomes very fast! Seems it depends on the file system's cache heavily!

... a while, the cursor read process becomes very slow'. I guess ... flag (sequence scan?) to the cursor and keep reading until finished.... that is leaking. Are all cursors closed when finished, and temporary ... clean the environment, it's very fast when read the first ... or 7 dbs, but becomes slow after that. Answers to any ...Run these after the program slows down. The output can be...

... resource that is leaking. Are all cursors closed when finished, and temporary memory .... Run these after the program slows down. The output can be big...and almost the same acount of records (about 500,000). These dbs are...have 4 threads to retrieve data from them through cursor simultaneously but no two thread will operate...> read process becomes very slow, it need more than 20 seconds to...

...8 bytes data) and almost the same acount of records (about 500,000). These dbs are opened in the... with transaction enabled. When initialization, I have 4 threads to retrieve data from them through cursor simultaneously but no two thread will operate on the same... 2 reads db 1, 5, ...; etc.). After a while, the cursor read process becomes very slow, it need more than 20 seconds to finish the read...

... here the guy is walking through a cursor, so I can predict ...> It is more like - the cursor visits all the data that is... for your application, reading sequentially through an entire database? Because we are...that matter to you. Reading sequentially through an entire database is not ... my own way), and provide very fast query service to the ... are good reasons it is slow - is the disk on a ...

Hi, I've got another better profiling result: 436,042,669,130 * ???:__dbc_get_pp [libdb-4.6.so] 3,340,463,958 ???:__dbt_userfree (128479383x) [libdb-4.6.so] 412,916,377,218 ???:__dbc_get (128479383x) [libdb-4.6.so] 1,430 ???:_dl_runtime_resolve (2x) [/lib/ld-2.3.6.so] 11,434,668,171 ???:__dbc_get_arg (128479383x) [libdb-4.6.so] 412,916,377,218 < ...