<!--$Id: log_stat.html,v 1.1.1.1 2003/02/15 04:55:53 zarzycki Exp $--> <!--Copyright 1997-2002 by Sleepycat Software, Inc.--> <!--All rights reserved.--> <!--See the file LICENSE for redistribution information.--> <html> <head> <title>Berkeley DB: DbEnv.log_stat</title> <meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> <meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++"> </head> <body bgcolor=white> <a name="2"><!--meow--></a> <table width="100%"><tr valign=top> <td> <h1>DbEnv.log_stat</h1> </td> <td align=right> <a href="../api_java/c_index.html"><img src="../images/api.gif" alt="API"></a><a href="../reftoc.html"><img src="../images/ref.gif" alt="Ref"></a> </td></tr></table> <hr size=1 noshade> <tt> <h3><pre> import com.sleepycat.db.*; <p> public DbLogStat log_stat(int flags) throws DbException; </pre></h3> <h1>Description</h1> <p>The DbEnv.log_stat method returns the logging subsystem statistics. <p>The <b>flags</b> value must be set to 0 or the following value: <p><dl compact> <p><dt><a name="Db.DB_STAT_CLEAR">Db.DB_STAT_CLEAR</a><dd>Reset statistics after returning their values. </dl> <p>The DbEnv.log_stat method creates a DbLogStat object encapsulating the log region statistics. The following data fields are available from the DbLogStat object: <p><dl compact> <dt>public int st_magic;<dd>The magic number that identifies a file as a log file. <dt>public int st_version;<dd>The version of the log file type. <dt>public int st_mode;<dd>The mode of any created log files. <dt>public int st_lg_bsize;<dd>The in-memory log record cache size. <dt>public int st_lg_size;<dd>The current log file size. <dt>public int st_w_mbytes;<dd>The number of megabytes written to this log. <dt>public int st_w_bytes;<dd>The number of bytes over and above <b>st_w_mbytes</b> written to this log. <dt>public int st_wc_mbytes;<dd>The number of megabytes written to this log since the last checkpoint. <dt>public int st_wc_bytes;<dd>The number of bytes over and above <b>st_wc_mbytes</b> written to this log since the last checkpoint. <dt>public int st_wcount;<dd>The number of times the log has been written to disk. <dt>public int st_wcount_fill;<dd>The number of times the log has been written to disk because the in-memory log record cache filled up. <dt>public int st_scount;<dd>The number of times the log has been flushed to disk. <dt>public int st_cur_file;<dd>The current log file number. <dt>public int st_cur_offset;<dd>The byte offset in the current log file. <dt>public int st_disk_file;<dd>The log file number of the last record known to be on disk. <dt>public int st_disk_offset;<dd>The byte offset of the last record known to be on disk. <dt>public int st_cur_offset;<dd>The byte offset of the last record known to be on disk. <dt>public int st_maxcommitperflush;<dd>The maximum number of commits contained in a single log flush. <dt>public int st_mincommitperflush;<dd>The minimum number of commits contained in a single log flush that contained a commit.] <dt>public int st_regsize;<dd>The size of the region. <dt>public int st_region_wait;<dd>The number of times that a thread of control was forced to wait before obtaining the region lock. <dt>public int st_region_nowait;<dd>The number of times that a thread of control was able to obtain the region lock without waiting. </dl> <p>The DbEnv.log_stat method throws an exception that encapsulates a non-zero error value on failure. <h1>Errors</h1> <p>The DbEnv.log_stat method may fail and throw an exception for errors specified for other Berkeley DB and C library or system methods. If a catastrophic error has occurred, the DbEnv.log_stat method may fail and throw a <a href="../api_java/runrec_class.html">DbRunRecoveryException</a>, in which case all subsequent Berkeley DB calls will fail in the same way. <h1>Class</h1> <a href="../api_java/env_class.html">DbEnv</a>, <a href="../api_java/logc_class.html">DbLogc</a>, <a href="../api_java/lsn_class.html">DbLsn</a> <h1>See Also</h1> <a href="../api_java/log_list.html">Logging Subsystem and Related Methods</a> </tt> <table width="100%"><tr><td><br></td><td align=right> <a href="../api_java/c_index.html"><img src="../images/api.gif" alt="API"></a><a href="../reftoc.html"><img src="../images/ref.gif" alt="Ref"></a> </td></tr></table> <p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font> </body> </html>