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Full Discussion: Getcwd performance issues
Operating Systems Solaris Getcwd performance issues Post 302821879 by Don Cragun on Saturday 15th of June 2013 11:50:55 PM
Old 06-16-2013
Quote:
Originally Posted by KotekBury
thanks for the suggestion but I can also reproduce it with a newly created folder:

Code:
>> mkdir test
>> cd test
>> truss -D pwd 2>&1 | grep getcwd
0.0001 getcwd("/opt_local/product/test", 1025) = 0
>> cd ..
>> mv test test1
>> cd test1
>> truss -D pwd 2>&1 | grep getcwd
0.2130 getcwd("/opt_local/product/test1", 1025) = 0
>> cd ..
>> mv test1 test
>> cd test
>> truss -D pwd 2>&1 | grep getcwd
 0.0001 getcwd("/opt_local/product/test", 1025) = 0

As soon as I rename it back to test1 it becomes slow again.
Session or shell change has no effect on it.
Of course. Renaming a directory or creating a new directory is exactly the same condition for this discussion; the shell is seeing a directory name that is not in its cache.
Quote:
Originally Posted by KotekBury
The same does not happen on a similar server with a different OS level
SunOS 5.10 Generic_147147-26 sun4u sparc SUNW,SPARC-Enterprise
As I said before, different shells may show different results. Even if the pathname of the shell you're using on the two servers is the same, there is no guarantee that the shell's processing remains the same from release to release. Changes in the OS itself or the filesystem type underlying the directories involved could also have a profound effect.
 

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pwd(1)							      General Commands Manual							    pwd(1)

NAME
pwd - Displays the pathname of the current working directory SYNOPSIS
pwd STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: pwd: XCU5.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. OPTIONS
None OPERANDS
None DESCRIPTION
The pwd command writes to standard output the full pathname of your current working directory. All directories are separated by a / (slash). The first / represents the root directory and the last directory named is your current working directory. EXIT STATUS
The following exit values are returned: Successful completion. An error occurred. ENVIRONMENT VARIABLES
The following environment variables affect the execution of pwd: Provides a default value for the internationalization variables that are unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization vari- ables contain an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string value, overrides the values of all the other internationalization variables. Determines the locale for the format and contents of diagnostic mes- sages written to standard error. Determines the location of message catalogues for the processing of LC_MESSAGES. SEE ALSO
Commands: cd(1), csh(1), ksh(1), Bourne shell sh(1b), POSIX shell sh(1p) Functions: stat(2), getcwd(3) Standards: standards(5) pwd(1)
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