File Descriptors


 
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Old 12-17-2002
File Descriptors

Hello all,

A few questions on file descriptors ...

scenario : Sun Ultra 30 with Sun OS 5.5.1 , E250 with Solaris 2.6

In one of my servers, the file descriptor status from the soft limit and hard limits are 64 and 1024 respectively for root user.

Is the soft limit (64) represents the maximum no of file descriptors that can be created by a SINGLE PROCESS of corresponding user ??

If this is true, how to identify the maximum resorce limit of a user ??

I had a look on

/usr/proc/bin/pfiles <pid> and

/proc/<pid>/fd ...

I also checked these statuses in another server which is running on Solaris 2.6.

I selected one oracle application pid, and it showed
Current rlimit : 1024 file descriptors

But when I log into oracle user and tried the limit, it was showing 64 and 1024 as soft and hard limits...

This is confusing me ...

I had another instance of file descriptor mismatch
( that of sysdef and limit ... sysdef shows ffffffff:fffffffd , but the limit shows 64:1024 !??? )

Could you please throw some light on these....

Is there any way to identify the no of active (open) file descriptors for a user and the limits ....
My aim is to get an early notification on file descriptor usage and prevent downtime...


(One of the server is SunOS 5.5.1, so I cant run a lsof.)


Thanks in Advance...
 
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Exacct::Object::Item(3PERL)				      Perl Library Functions				       Exacct::Object::Item(3PERL)

NAME
Exacct::Object::Item - exacct item manipulation SYNOPSIS
use Sun::Solaris::Exacct::Object; my $ea_item = Sun::Solaris::Exacct::Object::Item->new( &EXT_UINT64 | &EXC_DEFAULT | &EXD_PROC_PID, $$); DESCRIPTION
This module is used for manipulating libexacct(3LIB) data Items. A libexacct Item is represented as an opaque reference blessed into the Sun::Solaris::Exacct::Object::Item class, which is a subclass of the Sun::Solaris::Exacct::Object class. The underlying libexacct data types are mapped onto Perl types as follows: libexacct type Perl internal type EXT_UINT8 IV (integer) EXT_UINT16 IV (integer) EXT_UINT32 IV (integer) EXT_UINT64 IV (integer) EXT_DOUBLE NV (double) EXT_STRING PV (string) EXT_RAW PV (string) EXT_EXACCT_OBJECT Sun::Solaris::Exacct::Object subclass Constants None. Functions None. Class methods Class methods include those inherited from the Sun::Solaris::Exacct::Object base class, plus the following: new($catalog, $value) This method creates and returns a new Sun::Solaris::Exacct::Object::Item. The catalog tag can be either an integer or a Sun::Solaris::Exacct::Catalog. This catalog tag controls the conversion of the Perl value to the corresponding Perl exacct data type as described in the table above. If the catalog tag has a type field of EXT_EXACCT_OBJECT, the value must be a reference to either an Item or a Group object and the passed object is recursively copied and stored inside the new Item. Because the returned Item is constant, it is impossible, for example, to create an Item representing CPU seconds and subsequently modify its value or change its catalog value. This behavior is intended to prevent mismatches between the catalog tag and the data value. Object methods Object methods are those inherited from the Sun::Solaris::Exacct::Object. Exports None. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWpl5u | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ SEE ALSO
Exacct(3PERL), Exacct::Catalog(3PERL), Exacct::File(3PERL), Exacct::Object(3PERL), Exacct::Object::Group(3PERL), libexacct(3LIB), attributes(5) SunOS 5.10 1 Dec 2002 Exacct::Object::Item(3PERL)