mirror of
https://github.com/berkeleydb/libdb.git
synced 2024-11-17 01:26:25 +00:00
618 lines
22 KiB
HTML
618 lines
22 KiB
HTML
|
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
|||
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|||
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
|||
|
|
<head>
|
|||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
|
|||
|
|
<title>DbEnv::lock_stat()</title>
|
|||
|
|
<link rel="stylesheet" href="apiReference.css" type="text/css" />
|
|||
|
|
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
|
|||
|
|
<link rel="start" href="index.html" title="Berkeley DB C++ API Reference" />
|
|||
|
|
<link rel="up" href="lock.html" title="Chapter 7. The DbLock Handle" />
|
|||
|
|
<link rel="prev" href="lockput.html" title="DbEnv::lock_put()" />
|
|||
|
|
<link rel="next" href="lockstat_print.html" title="DbEnv::lock_stat_print()" />
|
|||
|
|
</head>
|
|||
|
|
<body>
|
|||
|
|
<div xmlns="" class="navheader">
|
|||
|
|
<div class="libver">
|
|||
|
|
<p>Library Version 11.2.5.2</p>
|
|||
|
|
</div>
|
|||
|
|
<table width="100%" summary="Navigation header">
|
|||
|
|
<tr>
|
|||
|
|
<th colspan="3" align="center">DbEnv::lock_stat()</th>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td width="20%" align="left"><a accesskey="p" href="lockput.html">Prev</a> </td>
|
|||
|
|
<th width="60%" align="center">Chapter 7.
|
|||
|
|
The DbLock Handle
|
|||
|
|
</th>
|
|||
|
|
<td width="20%" align="right"> <a accesskey="n" href="lockstat_print.html">Next</a></td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
<hr />
|
|||
|
|
</div>
|
|||
|
|
<div class="sect1" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h2 class="title" style="clear: both"><a id="lockstat"></a>DbEnv::lock_stat()</h2>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<pre class="programlisting">#include <db_cxx.h>
|
|||
|
|
|
|||
|
|
int
|
|||
|
|
DbEnv::lock_stat(DB_LOCK_STAT **statp, u_int32_t flags); </pre>
|
|||
|
|
<p>
|
|||
|
|
The <code class="methodname">DbEnv::lock_stat()</code> method returns the locking subsystem
|
|||
|
|
statistics.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The <code class="methodname">DbEnv::lock_stat()</code> method creates a statistical structure of
|
|||
|
|
type DB_LOCK_STAT and copies a pointer to it into a user-specified
|
|||
|
|
memory location.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
Statistical structures are stored in allocated memory. If
|
|||
|
|
application-specific allocation routines have been declared (see
|
|||
|
|
<a class="xref" href="envset_alloc.html" title="DbEnv::set_alloc()">DbEnv::set_alloc()</a>
|
|||
|
|
for more information), they are used to allocate the memory;
|
|||
|
|
otherwise, the standard C library <span class="bold"><strong>malloc</strong></span>(3) is used. The caller is responsible
|
|||
|
|
for deallocating the memory. To deallocate the memory, free the
|
|||
|
|
memory reference; references inside the returned memory need not be
|
|||
|
|
individually freed.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The following DB_LOCK_STAT fields will be filled in:
|
|||
|
|
</p>
|
|||
|
|
<div class="itemizedlist">
|
|||
|
|
<ul type="disc">
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_cur_maxid;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The current maximum unused locker ID.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_hash_len;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
Maximum length of a lock hash bucket.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_id;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The last allocated locker ID.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_initlocks;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The initial number of locks allocated in the lock
|
|||
|
|
table.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_initlockers;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The initial number of lockers allocated in the lock
|
|||
|
|
table.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_initobjects;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The initial number of lock objects allocated in the lock
|
|||
|
|
table.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_lock_nowait;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of lock requests not immediately available due to
|
|||
|
|
conflicts, for which the thread of control did not wait.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_lock_wait;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of lock requests not immediately available due to
|
|||
|
|
conflicts, for which the thread of control waited.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_lockers_nowait;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of requests to allocate or deallocate a locker for which
|
|||
|
|
the thread of control did not wait.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_lockers_wait;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of requests to allocate or deallocate a locker for which
|
|||
|
|
the thread of control waited.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_lockers;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The current number of lockers allocated in the lock table.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_locks;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The current number of locks allocated in the lock table.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_locksteals;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The maximum number of locks stolen by an empty partition.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>db_timeout_t st_locktimeout;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
Lock timeout value.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_maxhlocks;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The maximum number of locks in any hash bucket at any one time.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_maxhobjects;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The maximum number of objects in any hash bucket at any one time.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_maxlockers;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The maximum number of lockers possible.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_maxlocks;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The maximum number of locks possible.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_maxlsteals;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The maximum number of lock steals for any one partition.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_maxnlockers;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The maximum number of lockers at any one time.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_maxnobjects;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The maximum number of lock objects at any one time. Note that if there
|
|||
|
|
is more than one partition this is the sum of the maximum across all
|
|||
|
|
partitions.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_maxnlocks;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The maximum number of locks at any one time. Note that if there is
|
|||
|
|
more than one partition, this is the sum of the maximum across all
|
|||
|
|
partitions.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_maxobjects;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The maximum number of lock objects possible.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_maxosteals;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The maximum number of object steals for any one partition.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_ndeadlocks;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of deadlocks.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_ndowngrade;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The total number of locks downgraded.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_nlockers;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of current lockers.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_nlocks;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of current locks.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_nlocktimeouts;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of lock requests that have timed out.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>int st_nmodes;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of lock modes.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_nobjects;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of current lock objects.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_nreleases;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The total number of locks released.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_nrequests;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The total number of locks requested.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_ntxntimeouts;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of transactions that have timed out. This value is also a
|
|||
|
|
component of <span class="bold"><strong>st_ndeadlocks</strong></span>, the total
|
|||
|
|
number of deadlocks detected.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_nupgrade;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The total number of locks upgraded.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_objects;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The current number of lock objects allocated in the lock
|
|||
|
|
table.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_objectsteals;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The maximum number of objects stolen by an empty partition.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_objs_nowait;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of requests to allocate or deallocate an object for which
|
|||
|
|
the thread of control did not wait.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_objs_wait;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of requests to allocate or deallocate an object for which
|
|||
|
|
the thread of control waited.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_part_max_nowait;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of times that a thread of control was able to obtain any
|
|||
|
|
one lock partition mutex without waiting.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_part_max_wait;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The maximum number of times that a thread of control was forced to
|
|||
|
|
wait before obtaining any one lock partition mutex.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_part_nowait;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of times that a thread of control was able to obtain the
|
|||
|
|
lock partition mutex without waiting.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_part_wait;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of times that a thread of control was forced to wait before
|
|||
|
|
obtaining the lock partition mutex.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_partitions;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of lock table partitions.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_region_nowait;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of times that a thread of control was able to obtain the
|
|||
|
|
lock region mutex without waiting.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>uintmax_t st_region_wait;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The number of times that a thread of control was forced to wait before
|
|||
|
|
obtaining the lock region mutex.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>roff_t st_regsize;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The region size, in bytes.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>u_int32_t st_tablesize;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The size of the object hash table.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
<li>
|
|||
|
|
<p>
|
|||
|
|
<span class="bold"><strong>db_timeout_t st_txntimeout;</strong></span>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
Transaction timeout value.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
</ul>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
The <code class="methodname">DbEnv::lock_stat()</code> method may not be called before the
|
|||
|
|
<a class="xref" href="envopen.html" title="DbEnv::open()">DbEnv::open()</a> method is called.
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
The <code class="methodname">DbEnv::lock_stat()</code> method returns a non-zero error value on
|
|||
|
|
failure and 0 on success.
|
|||
|
|
</p>
|
|||
|
|
<div class="sect2" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h3 class="title"><a id="id3634962"></a>Parameters</h3>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect3" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h4 class="title"><a id="id3634959"></a>statp</h4>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
The <span class="bold"><strong>statp</strong></span> parameter references memory
|
|||
|
|
into which a pointer to the allocated statistics structure is copied.
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect3" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h4 class="title"><a id="id3635573"></a>flags</h4>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
The <span class="bold"><strong>flags</strong></span> parameter must be set to 0
|
|||
|
|
or the following value:
|
|||
|
|
</p>
|
|||
|
|
<div class="itemizedlist">
|
|||
|
|
<ul type="disc">
|
|||
|
|
<li>
|
|||
|
|
<p><a id="stat_DB_STAT_CLEAR"></a>
|
|||
|
|
<code class="literal">DB_STAT_CLEAR</code>
|
|||
|
|
</p>
|
|||
|
|
<p>
|
|||
|
|
Reset statistics after returning their values.
|
|||
|
|
</p>
|
|||
|
|
</li>
|
|||
|
|
</ul>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect2" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h3 class="title"><a id="id3635791"></a>Errors</h3>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
The <code class="methodname">DbEnv::lock_stat()</code> <span>
|
|||
|
|
|
|||
|
|
<span>
|
|||
|
|
method may fail and throw a <a class="link" href="dbexception.html" title="Chapter 6. The DbException Class">DbException</a>
|
|||
|
|
exception, encapsulating one of the following non-zero errors, or return one
|
|||
|
|
of the following non-zero errors:
|
|||
|
|
</span>
|
|||
|
|
</span>
|
|||
|
|
</p>
|
|||
|
|
<div class="sect3" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h4 class="title"><a id="id3635432"></a>EINVAL</h4>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
An invalid flag value or parameter was specified.
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect2" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h3 class="title"><a id="id3635918"></a>Class</h3>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
<a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a>,
|
|||
|
|
<a class="link" href="lock.html" title="Chapter 7. The DbLock Handle">DbLock</a>
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
<div class="sect2" lang="en" xml:lang="en">
|
|||
|
|
<div class="titlepage">
|
|||
|
|
<div>
|
|||
|
|
<div>
|
|||
|
|
<h3 class="title"><a id="id3635849"></a>See Also</h3>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<p>
|
|||
|
|
<a class="xref" href="lock.html#locklist" title="Locking Subsystem and Related Methods">Locking Subsystem and Related Methods</a>
|
|||
|
|
</p>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
<div class="navfooter">
|
|||
|
|
<hr />
|
|||
|
|
<table width="100%" summary="Navigation footer">
|
|||
|
|
<tr>
|
|||
|
|
<td width="40%" align="left"><a accesskey="p" href="lockput.html">Prev</a> </td>
|
|||
|
|
<td width="20%" align="center">
|
|||
|
|
<a accesskey="u" href="lock.html">Up</a>
|
|||
|
|
</td>
|
|||
|
|
<td width="40%" align="right"> <a accesskey="n" href="lockstat_print.html">Next</a></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr>
|
|||
|
|
<td width="40%" align="left" valign="top">DbEnv::lock_put() </td>
|
|||
|
|
<td width="20%" align="center">
|
|||
|
|
<a accesskey="h" href="index.html">Home</a>
|
|||
|
|
</td>
|
|||
|
|
<td width="40%" align="right" valign="top"> DbEnv::lock_stat_print()</td>
|
|||
|
|
</tr>
|
|||
|
|
</table>
|
|||
|
|
</div>
|
|||
|
|
</body>
|
|||
|
|
</html>
|