10e53c2beSJerome MarchandWhat: /proc/diskstats 20e53c2beSJerome MarchandDate: February 2008 30e53c2beSJerome MarchandContact: Jerome Marchand <jmarchan@redhat.com> 40e53c2beSJerome MarchandDescription: 50e53c2beSJerome Marchand The /proc/diskstats file displays the I/O statistics 60e53c2beSJerome Marchand of block devices. Each line contains the following 14 70e53c2beSJerome Marchand fields: 8bdca3c87SMichael Callahan 934433332SMauro Carvalho Chehab == =================================== 1034433332SMauro Carvalho Chehab 1 major number 11*ebab9426SBjorn Helgaas 2 minor number 1234433332SMauro Carvalho Chehab 3 device name 1334433332SMauro Carvalho Chehab 4 reads completed successfully 1434433332SMauro Carvalho Chehab 5 reads merged 1534433332SMauro Carvalho Chehab 6 sectors read 1634433332SMauro Carvalho Chehab 7 time spent reading (ms) 1734433332SMauro Carvalho Chehab 8 writes completed 1834433332SMauro Carvalho Chehab 9 writes merged 1934433332SMauro Carvalho Chehab 10 sectors written 2034433332SMauro Carvalho Chehab 11 time spent writing (ms) 2134433332SMauro Carvalho Chehab 12 I/Os currently in progress 2234433332SMauro Carvalho Chehab 13 time spent doing I/Os (ms) 2334433332SMauro Carvalho Chehab 14 weighted time spent doing I/Os (ms) 2434433332SMauro Carvalho Chehab == =================================== 25bdca3c87SMichael Callahan 26bdca3c87SMichael Callahan Kernel 4.18+ appends four more fields for discard 27bdca3c87SMichael Callahan tracking putting the total at 18: 28bdca3c87SMichael Callahan 2934433332SMauro Carvalho Chehab == =================================== 3034433332SMauro Carvalho Chehab 15 discards completed successfully 3134433332SMauro Carvalho Chehab 16 discards merged 3234433332SMauro Carvalho Chehab 17 sectors discarded 3334433332SMauro Carvalho Chehab 18 time spent discarding 3434433332SMauro Carvalho Chehab == =================================== 35bdca3c87SMichael Callahan 36b6866318SKonstantin Khlebnikov Kernel 5.5+ appends two more fields for flush requests: 37b6866318SKonstantin Khlebnikov 3854a19b4dSMauro Carvalho Chehab == ===================================== 3954a19b4dSMauro Carvalho Chehab 19 flush requests completed successfully 4054a19b4dSMauro Carvalho Chehab 20 time spent flushing 4154a19b4dSMauro Carvalho Chehab == ===================================== 42b6866318SKonstantin Khlebnikov 434f4cfa6cSMauro Carvalho Chehab For more details refer to Documentation/admin-guide/iostats.rst 44