IBM 000-8697 Manual de usuario descargar pdf (Pagina 566)

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7-88 IBM Informix OnLine Database Server Administrator’s Guide

Option Descriptions

-k Option

Usethe-koptiontodisplayinformation about activelocks.You caninterpret

output from this option as follows:

state indicates the current page-cleaner activity using the

following codes:

chunk write

exit

cleaner is idle

LRU queue

The “exit”code indicateseither that OnLine is in the process

of performing a shutdown or that a page cleaner did not

returnfromits write ina speciﬁcamount of time.This isalso

known as a time-out condition. The tbinit daemon does not

knowwhathappenedtothecleaner,soitismarkedas“exit.”

In either case, the cleaner process eventually exits.

data provides additional information in concert with the state

ﬁeld. If state is C, data is the chunk number to which the

page cleaner is writing buffers. If state is L, data is the LRU

queuefromwhichthepagecleaneriswriting.Thedata value

is displayed as a decimal, followed by an equal sign, and

repeated as a hexadecimal.

address istheaddressofthelockinthelocktable.Thisaddressappears

in the wait ﬁeld of the tbstat -u (users) output for the user

process that is waiting for this lock.

wtlist is the ﬁrst entry in the list of user processes waiting for the

lock, if there is one.

owner is theshared-memory address of the processholding thelock.

Thisaddresscorrespondstotheaddressintheaddress ﬁeldof

tbstat -u (users) output.Ifthe value ofowner is 0, thedatabase

server process that owned the transaction is dead.

lklist is the next lock in a linked list of locks held by the owner just

listed.

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