head 1.2; access; symbols RPM_4_2_1:1.1.1.5 RPM_4_2:1.1.1.5 RPM_4_1_1:1.1.1.5 RPM_4_1:1.1.1.4 RPM_4_0_5:1.1.1.3 RPM_4_0_4:1.1.1.2 RPM_4_0_3:1.1.1.1 RPM:1.1.1; locks; strict; comment @# @; 1.2 date 2008.01.02.09.52.50; author rse; state dead; branches; next 1.1; commitid z4cpSiAhOCXk5PLs; 1.1 date 2001.07.23.20.45.36; author rse; state Exp; branches 1.1.1.1; next ; 1.1.1.1 date 2001.07.23.20.45.36; author rse; state Exp; branches; next 1.1.1.2; 1.1.1.2 date 2002.01.08.00.30.08; author rse; state Exp; branches; next 1.1.1.3; 1.1.1.3 date 2003.01.18.13.48.55; author rse; state Exp; branches; next 1.1.1.4; 1.1.1.4 date 2001.12.06.00.07.57; author rse; state Exp; branches; next 1.1.1.5; 1.1.1.5 date 2003.01.18.14.04.56; author rse; state Exp; branches; next ; desc @@ 1.2 log @remove the ancient RPM 4.2.1 source tree copy @ text @ Berkeley DB: DB->set_h_nelem

DB->set_h_nelem

 APIRef 

#include <db.h>


int
DB->set_h_nelem(DB *db, u_int32_t h_nelem);

Description

Set an estimate of the final size of the hash table.

If not set or set too low, hash tables will still expand gracefully as keys are entered, although a slight performance degradation may be noticed.

The DB->set_h_nelem interface may be used only to configure Berkeley DB before the DB->open interface is called.

The DB->set_h_nelem function returns a non-zero error value on failure and 0 on success.

Errors

The DB->set_h_nelem function may fail and return a non-zero error for the following conditions:

EINVAL
An invalid flag value or parameter was specified.

Called after DB->open was called.

The DB->set_h_nelem function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the DB->set_h_nelem function may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.

See Also

db_create, DB->associate, DB->close, DB->cursor, DB->del, DB->err, DB->errx DB->fd, DB->get, DB->pget, DB->get_byteswapped, DB->get_type, DB->join, DB->key_range, DB->open, DB->put, DB->remove, DB->rename, DB->set_alloc, DB->set_append_recno, DB->set_bt_compare, DB->set_bt_minkey, DB->set_bt_prefix, DB->set_cachesize, DB->set_dup_compare, DB->set_errcall, DB->set_errfile, DB->set_errpfx, DB->set_feedback, DB->set_flags, DB->set_h_ffactor, DB->set_h_hash, DB->set_h_nelem, DB->set_lorder, DB->set_pagesize, DB->set_paniccall, DB->set_q_extentsize, DB->set_re_delim, DB->set_re_len, DB->set_re_pad, DB->set_re_source, DB->stat, DB->sync, DB->truncate, DB->upgrade, and DB->verify.

APIRef

Copyright Sleepycat Software @ 1.1 log @Initial revision @ text @d1 1 a1 1 @ 1.1.1.1 log @Import: RPM 4.0.3 @ text @@ 1.1.1.2 log @Import: RPM 4.0.4 @ text @d1 1 a1 1 @ 1.1.1.3 log @Import: RPM 4.0.5 @ text @d1 2 a2 2 a3 1 d29 1 a29 4

In order for the estimate to be used when creating the database, the DB->set_h_ffactor method must also be called. If the estimate or fill factor are not set or are set too low, hash tables will still expand gracefully d32 3 a34 8

The DB->set_h_nelem method configures a database, not only operations performed using the specified DB handle.

The DB->set_h_nelem interface may not be called after the DB->open interface is called. If the database already exists when DB->open is called, the information specified to DB->set_h_nelem will be ignored.

The DB->set_h_nelem method returns a non-zero error value on failure and 0 on success. d36 1 a36 1

The DB->set_h_nelem method may fail and return a non-zero error for the following conditions: d41 4 a44 6

The DB->set_h_nelem method may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the DB->set_h_nelem method may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.

Class

DB d46 46 a91 1 Databases and Related Methods @ 1.1.1.4 log @Import: RPM 4.1 @ text @d1 2 a2 2 d4 1 d30 4 a33 1

If not set or set too low, hash tables will still expand gracefully d36 8 a43 3

The DB->set_h_nelem interface may be used only to configure Berkeley DB before the DB->open interface is called.

The DB->set_h_nelem function returns a non-zero error value on failure and 0 on success. d45 1 a45 1

The DB->set_h_nelem function may fail and return a non-zero error for the following conditions: d50 6 a55 4

The DB->set_h_nelem function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the DB->set_h_nelem function may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way. d57 1 a57 46 db_create, DB->associate, DB->close, DB->cursor, DB->del, DB->err, DB->errx DB->fd, DB->get, DB->pget, DB->get_byteswapped, DB->get_type, DB->join, DB->key_range, DB->open, DB->put, DB->remove, DB->rename, DB->set_alloc, DB->set_append_recno, DB->set_bt_compare, DB->set_bt_minkey, DB->set_bt_prefix, DB->set_cachesize, DB->set_dup_compare, DB->set_errcall, DB->set_errfile, DB->set_errpfx, DB->set_feedback, DB->set_flags, DB->set_h_ffactor, DB->set_h_hash, DB->set_h_nelem, DB->set_lorder, DB->set_pagesize, DB->set_paniccall, DB->set_q_extentsize, DB->set_re_delim, DB->set_re_len, DB->set_re_pad, DB->set_re_source, DB->stat, DB->sync, DB->truncate, DB->upgrade, and DB->verify. @ 1.1.1.5 log @Import: RPM 4.1.1 @ text @d1 2 a2 2 a3 1 d29 1 a29 4

In order for the estimate to be used when creating the database, the DB->set_h_ffactor method must also be called. If the estimate or fill factor are not set or are set too low, hash tables will still expand gracefully d32 3 a34 8

The DB->set_h_nelem method configures a database, not only operations performed using the specified DB handle.

The DB->set_h_nelem interface may not be called after the DB->open interface is called. If the database already exists when DB->open is called, the information specified to DB->set_h_nelem will be ignored.

The DB->set_h_nelem method returns a non-zero error value on failure and 0 on success. d36 1 a36 1

The DB->set_h_nelem method may fail and return a non-zero error for the following conditions: d41 4 a44 6

The DB->set_h_nelem method may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the DB->set_h_nelem method may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.

Class

DB d46 46 a91 1 Databases and Related Methods @