I have a 83GB compressed .sql.gz file that I'm importing. The DB size on the source server (the size of the folder) was 240GB.
I'm importing it on a Amazon cloud server, with 2CPUs, 4GM RAM and SSD disk, using innodb buffer of 2.2GB and max packet of 128MB. The allowed IOPS on the server are 1200. I'm running version 5.5.63 for "legacy reasons".
The import command is like this:
zcat dump.sql.gz | mysql -u root -ppasswd DB_NAME
Most of the volume is due to 4 compressed tables that are also partitioned by timestamp range.
The import is going very slowly. The .ibd files for the compressed tables (or rather, the one that is at that time receiving data) increase at a super-slow rate of 40MB per 5 minute period, as I find using "ls -l" 5 minutes apart. The intriguing thing is that the iostat utility reports that every 5sec between 50MB-140MB are written on disk, here is an example:
avg-cpu: %user %nice %system %iowait %steal %idle 33.00 0.00 0.99 2.37 11.86 51.78 Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn xvda 657.60 0.00 13877.70 0 69388
So, bottom line, the operating system reports that the disk is seeing a lot of traffic, but the innodb table files are increasing at a snail's pace.
Thanks for any clues as to what is going on.