Camilo Porto wrote: > > Hello, > > I would like to better understand the semantics of the statistics shown in PostgreSQL Logs. For example, in the report: > > DETAIL: ! system usage stats: > ! 0.000100 elapsed 0.000000 user 0.000000 system sec > ! [0.016997 user 0.006998 sys total] > ! 0/0 [0/0] filesystem blocks in/out > ! 0/2 [0/1301] page faults/reclaims, 0 [0] swaps > ! 0 [0] signals rcvd, 0/0 [0/0] messages rcvd/sent > ! 0/0 [6/20] voluntary/involuntary context switches The above are from getrusage(). See the getrusage manual page. > ! buffer usage stats: > ! Shared blocks: 1 read, 0 written, buffer hit rate = 0.00% > ! Local blocks: 0 read, 0 written, buffer hit rate = 0.00% > ! Direct blocks: 0 read, 0 written > > What each element of this report mean? This outlines the shared/local buffer I/O and file system I/O performed. -- Bruce Momjian <bruce@xxxxxxxxxx> http://momjian.us EnterpriseDB http://www.enterprisedb.com + If your life is a hard drive, Christ can be your backup. + ---------------------------(end of broadcast)--------------------------- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to majordomo@xxxxxxxxxxxxxx so that your message can get through to the mailing list cleanly
