Hi
I was testing load table in IQ16SP08PL24 vs. IQ15.4ESD5. Using the exact same cfg file (except IQ16 need -iqlm in the cfg), and use the exact same raw device for dbspace and same file system temp space. Same create table script, same load table script.
Load 110000000 rows table from gzip file
IQ16SP08PL24 took 1384 seconds while IQ15.4ESD5 took 319 seconds.
I used iostat to check io and cpu, IQ16SP08PL24 only 4% cpu usage during the load while IQ15.4 ESD5 has 35% cpu usage. Seems like IQ15.4 ESD5 using parallel loading while IQ16SP08PL24 use sing thread loading.
Tested with gunzip file, same performance, 1314 seconds vs. 313 seconds.
I am not using RLV, so not configuring RLV at all.
Then I downloaded IQ16SP08PL35, did the same LOAD TABLE test with the same script and cfg.file.
The performance was not really improving for gzip file loading, IQ16SP08PL35 took 1294 seconds, yet, it improved quite dramatically when loading gunzip file, it took 261 seconds. And iostat show cpu was up to 36%.
Just a note of it, IQ database was created with all default options for IQ16 and IQ15.4, no option added in the load table script and the DDL was using IQ UNIQUE(255).
Thanks for any tips to resolve this slow performance issue.