Log to your mysql with mysql -u username -pPassword and execute: mysql> SHOW VARIABLES LIKE “general_log%”; +——————+—————————-+ | Variable_name | Value | +——————+—————————-+ | general_log | OFF | | general_log_file | /var/run/mysqld/mysqld.log | +——————+—————————-+ mysql> SET GLOBAL general_log = ‘ON’; Then in another terminal execute tail -f -n300 /var/run/mysqld/mysqld.log Then don’t forget to disable general_log […]
For experimentation, it’s very convenient to be able to drop the disk cache. For this, we can use the special file /proc/sys/vm/drop_caches. By writing 3 to it, we can clear most of the disk cache: $ free -m total used free shared buffers cached Mem: 1504 1471 33 0 36 801 -/+ buffers/cache: 633 871 […]
One of the changes between ns-3 ver 3.25 and ver 3.26 is that now it is possible to set TOS value to the address. Yes, you read it right, TOS value to the address. Official Doxygen states following: https://www.nsnam.org/docs/release/3.26/models/html/sockets-api.html The native sockets API for ns-3 provides two public methods (of the Socket base class): void […]
When you copy a partition at the byte level (with dd or similar tools), you are copying the entire filesystem which will have the same size even in a newer, larger HDD. Therefore, it is necessery just to execute resize2fs /dev/sdX where /dev/sdX is the name of your partition. resize2fs will grow the filesystem when […]