(ITS#7841) high disk utilization

Full_Name: Dmitrii Fonariuk Version: 2.4.38 OS: rhEL6.x86_64 URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (91.210.4.1)

There is a big value of DISK WRITE parameter in utility Iotop when in MDB a lot of Free pages (Freelist Status). Supposedly this situation arises from memory management algorithm. The algorithm FIFO is used for pages block allocation in free pages pool. We touched and dirty different pages on every modification transaction, which then flushed to disk by system process Flush. Perhaps it would be better to use the LIFO, which will to dirty the same pages by different transactions, which reduces the load on the disk? we use MDB with EnvFlags writemap and mapasync.