MELVYL CATALOG DATABASE TELNET STATISTICS
Time period: 12/30/00 through 01/05/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 575 1,748 2,323
Davis 1,409 268 1,677
Irvine 509 0 509
Los Angeles 98 326 424
Riverside 459 85 544
San Diego 286 185 471
San Francisco 248 0 248
Santa Barbara 184 181 365
Santa Cruz 221 179 400
LBL 0 71 71
LLL 0 65 65
Other - UC 27 102 129
CSL 0 103 103
CSU n/a 71 71
Other-Non-UC n/a 2,980 2,980
_______ ______ _____
4,016 6,364 10,380
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 175 554 5,750
2-4 a.m. 115 521 5,742
4-6 a.m. 121 629 4,792
6-8 a.m. 278 1,274 9,050
8-10 a.m. 1,276 4,222 31,527
10-12 a.m. 2,079 7,462 52,370
12-2 p.m. 2,087 6,515 46,673
2-4 p.m. 2,361 7,549 58,691
4-6 p.m. 1,116 3,746 28,719
6-8 p.m. 328 917 7,786
8-10 p.m. 227 557 3,638
10-12 p.m. 217 627 6,876
__________ __________ __________ _________________
Total: 10,380 34,573 261,614
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,431 5,141 6,572
Davis 5,268 1,007 6,275
Irvine 1,601 0 1,601
Los Angeles 264 681 945
Riverside 1,385 358 1,743
San Diego 996 299 1,295
San Francisco 459 0 459
Santa Barbara 533 495 1,028
Santa Cruz 1,090 522 1,612
LBL 0 117 117
LLL 0 168 168
Other - UC 23 300 323
CSL 0 238 238
CSU n/a 251 251
Other-Non-UC n/a 11,946 11,946
_______ ______ _____
13,050 21,523 34,573
1.3 Records Displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 10,875 44,302 55,177
Davis 33,905 7,034 40,939
Irvine 12,420 0 12,420
Los Angeles 1,510 5,414 6,924
Riverside 9,439 1,737 11,176
San Diego 5,114 2,129 7,243
San Francisco 3,150 0 3,150
Santa Barbara 4,626 3,822 8,448
Santa Cruz 4,993 3,549 8,542
LBL 0 895 895
LLL 0 2,356 2,356
Other - UC 154 1,459 1,613
CSL 0 1,899 1,899
CSU n/a 3,690 3,690
Other-Non-UC n/a 97,142 97,142
_______ ______ _____
86,186 175,428 261,614
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.5
Standard deviation in seconds 1.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.3
Standard deviation in seconds 1.7
2.0 COMMAND mode statistics:
____________________________
Median session length (minutes:seconds) 8:58
Average session length (minutes:seconds) 14:16
Longest session recorded (minutes:seconds) 731:33
Average number of searches completed per session 3.3
Retrievals per search - median 2.0
Retrievals per search - average 51.5
Retrievals per search - standard deviation 487.1
Percent of searches completed with 0 results 27.0%
Percent of searches entered that are long 3.9%
Percent of long searches completed
(includes partial results) 65.1%
Commands entered, by type, excluding errors:
Total Percentage
FIND 33,448 35.3%
DISPLAY (excluding automatic displays) 31,288 33.0%
ACFIND 4 0.0%
BROWSE 166 0.2%
SELECT 221 0.2%
HELP 632 0.7%
EXPLAIN 710 0.7%
SET/RESET 2,582 2.7%
SHOW 215 0.2%
AT 1,803 1.9%
ADD ON (AND, OR, AND NOT) 1,082 1.1%
LOGON or LOGOFF 16,696 17.6%
COMMENT 2 0.0%
SAVE 972 1.0%
USE 743 0.8%
OTHER 4,200 4.4%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 5,696 16.2% 1,282 22.5% 11 79.5 334.3
AUTHOR 1,422 4.0% 344 24.2% 12 106.5 383.1
CORPORATE AUTH 351 1.0% 135 38.5% 26 434.2 1840.5
EXACT CA 3 0.0% 0 0.0% 6 12.3 11.8
TITLE WORD 8,975 25.5% 2,838 31.6% 4 38.9 389.4
EXACT TITLE 4,535 12.9% 1,290 28.4% 2 18.4 107.8
TITLE -> TW 888 2.5% 242 27.3% 6 42.9 102.3
TITLE -> XT 945 2.7% 465 49.2% 1 12.2 50.5
SUBJECT 1,261 3.6% 441 35.0% 41 336.0 1092.0
EXACT SUBJECT 108 0.3% 23 21.3% 72 555.7 1209.0
PERIODICAL 6,494 18.4% 1,463 22.5% 4 65.2 597.5
EXACT PE 2,164 6.1% 327 15.1% 2 28.6 628.3
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 2 0.0% 0 0.0% 1 1.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 25 0.1% 3 12.0% 63 175.9 305.2
DATE 546 1.6% 141 25.8% 3 49.4 180.2
FORM 538 1.5% 128 23.8% 7 159.2 1113.0
NUMBER* 26 0.1% 8 30.8% 2 59.3 153.1
MUSIC* 18 0.1% 15 83.3% 11 963.7 1657.9
SERIES 796 2.3% 253 31.8% 3 157.4 1661.5
UNIFORM TITLE 2 0.0% 0 0.0% 1,695 1695.0 2231.6
Other indexes 412 1.2% 148 35.9% 1 7.8 28.8
* Number indexes include REPORT NUMBER STOCK NUMBER,
GOVERNMENT DOCUMENTS, and GPO ITEM NUMBER;
Music indexes include MUSICAL KEY, MUSIC PUBLISHER, and THEMATIC
By number of indexes:
Multiple 2,070 6.3% 557 26.9% 3 42.3 300.8
Single 30,919 93.7% 8,387 27.1% 4 73.1 591.1
BROWSEs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. BROs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 10 7.4% 0 0.0% 6 13.9 18.7
CORPORATE AUTH 1 0.7% 0 0.0% 200 200.0 0.0
EXACT CA 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 99 72.8% 17 17.2% 24 141.3 495.7
EXACT SUBJECT 26 19.1% 2 7.7% 91 71.9 31.3
UNIFORM TITLE 0 0.0% 0 0.0% 0 0.0 0.0
SERIES 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 158 100% 23 14.6% 28 110.3 390.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 12.3%
BRIEF 66.9%
LONG 10.4%
MARC 3.2%
FIELDS 3.3%
TAG 2.0%
PERIODICALS 0.0%
COMMENTS 0.0%
Other (includes BROWSE, ACFIND) 2.0%
3.0 Error, EXPLAIN and HELP statistics
__________________________________________________________
Percent of commands that contained errors 7.5%
Ten most frequent errors:
1. NS command - no next screen 31.3%
2. First word of command is invalid 25.0%
3. FIND command with invalid index name 11.9%
4. DISPLAY command contains invalid word 4.5%
5. Search term missing from search command 2.3%
6. KW search in database w/o KW index 2.1%
7. DISPLAY command - no FIND results 2.0%
8. PS command - no previous screen 2.0%
9. Max. # of ports to a Z39 db are in use 1.8%
10. Index invalid in current database 1.6%
11. All others 15.6%
Ten most frequent EXPLAIN requests:
1. GUIDE 22.3%
2. FIND 14.2%
3. INDEXES 7.3%
4. COMMAND WORDS 7.3%
5. Unrecognized term 5.8%
6. DISPLAY 3.1%
7. DATABASES 2.7%
8. PASSWORDS 2.7%
9. CATALOG 2.3%
10. NRLF 1.8%
11. All others 30.6%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.0%
2. First word of command is invalid 12.6%
3. FIND command with invalid index name 12.5%
4. DISPLAY command - middle of >1 screen 4.7%
5. DISPLAY command-complete in one screen 3.4%
6. NS command - no next screen 3.3%
7. F/BR with index invalid in current DB 3.1%
8. DISPLAY command-first of >1 screen 2.8%
9. Help requested from SET DB command 2.7%
10. KW search in database w/o KW index 2.0%
11. All others 32.9%
Ten most frequent SHOW requests:
1. HISTORY 41.4%
2. GLOSSARY 10.0%
3. SEARCH 10.0%
4. TIME 9.0%
5. SETTINGS 3.8%
6. MAIL STATUS 3.3%
7. SYSTEM NEWS 1.9%
8. SYSTEMS INFORMATION 1.9%
9. DATABASE NEWS 1.4%
10. UPDATE 1.4%
11. All others 15.7%
CATmm/dd cat MELVYL CATALOG DATABASE TELNET STATISTICS (weekly)