MELVYL CATALOG DATABASE TELNET STATISTICS
Time period: 12/16/00 through 12/22/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 690 2,046 2,736
Davis 1,384 236 1,620
Irvine 557 0 557
Los Angeles 107 439 546
Riverside 461 87 548
San Diego 380 195 575
San Francisco 298 0 298
Santa Barbara 224 163 387
Santa Cruz 250 123 373
LBL 0 88 88
LLL 0 61 61
Other - UC 37 134 171
CSL 0 181 181
CSU n/a 52 52
Other-Non-UC n/a 3,236 3,236
_______ ______ _____
4,388 7,041 11,429
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 248 678 7,147
2-4 a.m. 151 460 3,787
4-6 a.m. 106 392 2,190
6-8 a.m. 356 761 5,822
8-10 a.m. 1,515 4,141 30,507
10-12 a.m. 2,356 8,147 54,266
12-2 p.m. 2,191 6,743 52,737
2-4 p.m. 2,231 7,309 49,428
4-6 p.m. 1,331 4,019 35,094
6-8 p.m. 454 1,252 10,760
8-10 p.m. 242 791 6,494
10-12 p.m. 248 696 8,928
__________ __________ __________ _________________
Total: 11,429 35,389 267,160
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,662 5,505 7,167
Davis 4,814 1,073 5,887
Irvine 2,251 0 2,251
Los Angeles 272 815 1,087
Riverside 1,269 305 1,574
San Diego 1,751 399 2,150
San Francisco 536 0 536
Santa Barbara 681 272 953
Santa Cruz 858 333 1,191
LBL 0 95 95
LLL 0 123 123
Other - UC 45 385 430
CSL 0 301 301
CSU n/a 111 111
Other-Non-UC n/a 11,533 11,533
_______ ______ _____
14,139 21,250 35,389
1.3 Records Displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 16,024 47,619 63,643
Davis 27,260 4,851 32,111
Irvine 15,690 0 15,690
Los Angeles 2,087 8,055 10,142
Riverside 12,374 2,873 15,247
San Diego 6,560 2,429 8,989
San Francisco 5,067 0 5,067
Santa Barbara 6,498 2,553 9,051
Santa Cruz 5,666 2,216 7,882
LBL 0 599 599
LLL 0 1,402 1,402
Other - UC 220 2,370 2,590
CSL 0 1,797 1,797
CSU n/a 1,152 1,152
Other-Non-UC n/a 91,798 91,798
_______ ______ _____
97,446 169,714 267,160
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 1.5
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.3
Standard deviation in seconds 0.4
2.0 COMMAND mode statistics:
____________________________
Median session length (minutes:seconds) 10:08
Average session length (minutes:seconds) 14:40
Longest session recorded (minutes:seconds) 836:27
Average number of searches completed per session 3.1
Retrievals per search - median 2.0
Retrievals per search - average 51.1
Retrievals per search - standard deviation 691.7
Percent of searches completed with 0 results 26.9%
Percent of searches entered that are long 3.7%
Percent of long searches completed
(includes partial results) 62.4%
Commands entered, by type, excluding errors:
Total Percentage
FIND 34,254 35.1%
DISPLAY (excluding automatic displays) 30,994 31.8%
ACFIND 9 0.0%
BROWSE 198 0.2%
SELECT 144 0.1%
HELP 654 0.7%
EXPLAIN 638 0.7%
SET/RESET 2,781 2.9%
SHOW 286 0.3%
AT 2,186 2.2%
ADD ON (AND, OR, AND NOT) 1,116 1.1%
LOGON or LOGOFF 18,253 18.7%
COMMENT 9 0.0%
SAVE 612 0.6%
USE 921 0.9%
OTHER 4,490 4.6%
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 5,642 15.7% 1,320 23.4% 11 82.7 519.6
AUTHOR 1,351 3.8% 296 21.9% 12 90.0 452.0
CORPORATE AUTH 405 1.1% 134 33.1% 13 554.2 5486.3
EXACT CA 13 0.0% 2 15.4% 255 945.8 1762.1
TITLE WORD 8,694 24.2% 2,733 31.4% 4 44.7 443.7
EXACT TITLE 5,349 14.9% 1,473 27.5% 2 20.5 141.6
TITLE -> TW 1,091 3.0% 318 29.1% 7 52.3 111.9
TITLE -> XT 1,027 2.9% 508 49.5% 1 6.3 19.3
SUBJECT 1,706 4.7% 590 34.6% 35 257.5 1225.4
EXACT SUBJECT 118 0.3% 23 19.5% 83 305.8 783.3
PERIODICAL 6,090 16.9% 1,230 20.2% 4 69.8 802.6
EXACT PE 1,950 5.4% 288 14.8% 3 21.9 117.3
RPE 3 0.0% 1 33.3% 9 8.5 2.1
XRP 3 0.0% 1 33.3% 61 61.0 82.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 79 0.2% 19 24.0% 36 198.2 546.2
DATE 485 1.3% 117 24.1% 3 75.9 400.5
FORM 491 1.4% 125 25.5% 13 80.8 231.0
NUMBER* 37 0.1% 19 51.3% 3 13.1 27.9
MUSIC* 17 0.0% 10 58.8% 19 34.3 30.2
SERIES 861 2.4% 244 28.3% 2 99.8 1145.9
UNIFORM TITLE 7 0.0% 2 28.6% 6 654.8 1454.7
Other indexes 559 1.6% 266 47.6% 1 24.3 152.0
* 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 2,045 6.1% 566 27.7% 4 54.8 280.4
Single 31,739 93.9% 8,552 26.9% 4 72.0 843.9
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 15 8.4% 0 0.0% 21 53.4 88.9
CORPORATE AUTH 0 0.0% 0 0.0% 0 0.0 0.0
EXACT CA 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 152 85.4% 26 17.1% 26 92.4 139.4
EXACT SUBJECT 9 5.1% 1 11.1% 34 124.5 172.8
UNIFORM TITLE 0 0.0% 0 0.0% 0 0.0 0.0
SERIES 2 1.1% 1 50.0% 20 20.0 0.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 188 100% 31 16.5% 25 86.0 134.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 10.4%
BRIEF 66.0%
LONG 10.9%
MARC 3.5%
FIELDS 3.4%
TAG 2.9%
PERIODICALS 0.0%
COMMENTS 0.0%
Other (includes BROWSE, ACFIND) 2.9%
3.0 Error, EXPLAIN and HELP statistics
__________________________________________________________
Percent of commands that contained errors 7.3%
Ten most frequent errors:
1. NS command - no next screen 30.8%
2. First word of command is invalid 26.3%
3. FIND command with invalid index name 12.2%
4. DISPLAY command contains invalid word 3.7%
5. Search term missing from search command 2.4%
6. Max. # of ports to a Z39 db are in use 2.4%
7. KW search in database w/o KW index 2.0%
8. DISPLAY command - no FIND results 1.9%
9. PS command - no previous screen 1.8%
10. Valid command at an inappropriate time 1.5%
11. All others 15.1%
Ten most frequent EXPLAIN requests:
1. GUIDE 20.1%
2. FIND 11.8%
3. INDEXES 8.6%
4. COMMAND WORDS 6.7%
5. PASSWORDS 5.3%
6. Unrecognized term 4.4%
7. DATABASES 3.3%
8. CATALOG 3.1%
9. DISPLAY 2.8%
10. ADD-ON SEARCH 2.4%
11. All others 31.5%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 21.1%
2. First word of command is invalid 15.0%
3. FIND command with invalid index name 11.0%
4. NS command - no next screen 4.0%
5. FIND command retrieves >1 book 3.8%
6. DISPLAY command - last of >1 screen 3.4%
7. DISPLAY command - middle of >1 screen 3.3%
8. DISPLAY command-complete in one screen 2.7%
9. TW search with zero results 2.3%
10. F/BR with index invalid in current DB 2.1%
11. All others 31.2%
Ten most frequent SHOW requests:
1. HISTORY 32.7%
2. TIME 30.6%
3. GLOSSARY 7.8%
4. SEARCH 6.8%
5. MAIL SETTINGS 3.6%
6. SETTINGS 1.8%
7. MEDLINE NEWS 1.8%
8. DATABASES 1.8%
9. MAIL STATUS 1.4%
10. DATABASE NEWS 1.1%
11. All others 10.7%
CATmm/dd cat MELVYL CATALOG DATABASE TELNET STATISTICS (weekly)