12-07-2010
So I found the script that was causing the poor performance, but other symptoms have surfaced as well. Sometimes a simple 'ls' on a directory with 30 files will cause the disk to spin for 45 or so seconds while the box is under no other I/O load. Again, no error messages are apparent, and SMART data looks fine.
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slock(9s) slock(9s)
NAME
slock - General: Contains simple lock-specific information
SYNOPSIS
The slock data structure is an opaque data structure; that is, its associated members are referenced and manipulated by the operating sys-
tem and not by the user of the simple lock method. Therefore, this reference page omits a description of the slock data structure's associ-
ated members.
DESCRIPTION
The slock data structure is the simple spin lock structure that contains simple lock-specific information. The user of the simple lock
method declares a slock data structure by calling the decl_simple_lock_data routine. In subsequent calls to simple_lock, simple_lock_init,
simple_lock_try, and simple_unlock, the caller passes the address of the previously declared slock data structure.
NOTES
The header file <lock.h> shows typedef statements that assign the alternate name simple_lock_data_t for the simple spin lock structure and
simple_lock_t for a pointer to the simple spin lock structure.
FILES
SEE ALSO
Routines: decl_simple_lock_data(9r), simple_lock(9r), simple_lock_init(9r), simple_lock_terminate(9r), simple_lock_try(9r), sim-
ple_unlock(9r)
Data Structures: lock(9s)
slock(9s)