app log on boot, my boot is very slow

I'm not sure what is and if is possible to speed up my boot, but it some times take really a lot to full boot like 5/10 minutes i hear a lot of activity on my disk

i have a i5 2 years old mac, on boot i launch dropbox, skydive, ad some different utility that i need

looking at activity monitor i see under disk after full boot
how can i log what app process use cpu, ram and disk at load?

DISK USAGE

READ
Finder 1,78Gb
mds 1,22Gb
backupd 254,1Mb

WRITE
kernel_task 384,5Mb
Mail 208,4Mb
backupd 94,6Mb

RAM (i have 16Gb of RAM)
Kernel_task 1,08Gb
mds_stores 411Mb
com.apple.IconServicesAgent 396,4Mb

 

is for full boot i mean when i stop listening read / write on disk an system is usable
i guess i found what i could be, is something spotlight related, spotlight is always indexing on boot
so i used this command found on other post on apple forum

syslog -k Sender mdworker -o -k Sender mds | grep -v boxd | tail | open -f -a TextEdit

i found some error
<Error>: (Normal) Import: Using too many resources after 1408 files (wired: 0 resident: 4358 swapped: 0 regions: 2071), hit usage threshold importing... [cut]

i guess is related to my gmail imap inbox with too many messages, i'm not sure if moving them to local folder would delete from gmail

other spotlight error are

Code:

Jan  2 12:11:21 iMac-di-Al404.local mds[37] <Error>: (Normal) FMW: FMW 0 0
Jan  2 12:11:22 iMac-di-Al404.local mds[37] <Error>: (Warning) Server: No stores registered for metascope "kMDQueryScopeComputer"
Jan  2 12:11:28 iMac-di-Al404.local mds[37] <Error>: (Normal) Volume: volume:0x7fe93404fc00 ********** Bootstrapped Creating a default store:0 SpotLoc:(null) SpotVerLoc:(null) occlude:0 /Volumes/Multimedia
Jan  2 12:15:27 iMac-di-Al404.local mds[37] <Error>: (Normal) Volume: volume:0x7fe93381e000 ********** Bootstrapped Creating a default store:0 SpotLoc:(null) SpotVerLoc:(null) occlude:0 /Volumes/firmwaresyncd.msW9Qo

 

That sounds more like a windows solution
I need to found what is slowing down boot