I’m working on an hibernate Spring Mysql app, sometimes when i make a gethibernateTemplate()get(class,id) i can see a bunch of HQL in the logs and the application hangs, have to kill tomcat. This method reads trhough a 3,000 lines file, and there should be 18 files of these, i’ve been thinking i probably been looking at this wrong. I need you to help me check this at database level , but i don´t know hot to approach. Maybe my database can´t take so many hits so fast.
I´v looked in phpMyAdmin in the information bout executions time section, i see a red values in:
Innodb_buffer_pool_reads 165
Handler_read_rnd 40
Handler_read_rnd_next 713 k
Created_tmp_disk_tables 8
Opened_tables 30
Can i set the application some how to threat more gently the database ?
How can i check if this is the issue ?
Update
I put a
Thread.sleep(2000);
at the end of each cycle and it made the same numbers of calls (18), so i guess this wont be te reason ? can i discard this approach ?
This is a different view of this question
Hibernate hangs or throws lazy initialization no session or session was closed
trying some different
Update 2
Think it might be the buffer reader reading the file?? file is 44KB, tried this method:
http://code.hammerpig.com/how-to-read-really-large-files-in-java.html
class but did not work.
I rewrote the program so i load the information directly into the database using mysql query LOAD DATA INFILE. It works very fast. Then i updated rows changing some fields i need also with sql queries. I think there is simply too much information at the same time to manage trhough memory and abstractions.