MELVYL CATALOG DATABASE TELNET STATISTICS
Time period: 01/01/99 through 01/31/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 8,497 16,868 25,365
Davis 23,449 2,544 25,993
Irvine 11,269 0 11,269
Los Angeles 3,218 8,861 12,079
Riverside 6,562 2,080 8,642
San Diego 2,661 6,146 8,807
San Francisco 4,489 159 4,648
Santa Barbara 6,720 4,046 10,766
Santa Cruz 5,122 4,249 9,371
LBL 0 811 811
LLL 0 659 659
Other - UC 332 1,318 1,650
CSL 0 935 935
CSU n/a 1,637 1,637
Other-Network UC n/a 32,986 32,986
_______ ______ _____
72,319 83,299 155,618
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 2,392 10,792 68,579
2-4 a.m. 1,627 6,946 48,271
4-6 a.m. 1,469 5,517 34,046
6-8 a.m. 3,283 9,716 72,065
8-10 a.m. 15,062 44,987 347,626
10-12 a.m. 27,683 79,841 605,839
12-2 p.m. 29,713 83,406 644,734
2-4 p.m. 34,478 96,084 720,732
4-6 p.m. 21,768 61,216 480,145
6-8 p.m. 8,380 22,851 181,677
8-10 p.m. 5,757 15,298 122,702
10-12 p.m. 4,007 13,899 103,839
__________ __________ __________ _________________
Total: 155,619 450,553 3,430,255
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 27,231 42,633 69,864
Davis 81,679 6,729 88,408
Irvine 25,245 0 25,245
Los Angeles 5,236 12,583 17,819
Riverside 20,924 4,797 25,721
San Diego 7,293 9,241 16,534
San Francisco 5,512 188 5,700
Santa Barbara 23,081 9,278 32,359
Santa Cruz 14,648 14,366 29,014
LBL 0 1,440 1,440
LLL 0 1,485 1,485
Other - UC 230 3,178 3,408
CSL 0 1,661 1,661
CSU n/a 6,757 6,757
Other-Network UC n/a 125,136 125,136
_______ ______ _____
211,079 239,472 450,551
1.3 Records Displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 215,895 371,608 587,503
Davis 536,725 41,070 577,795
Irvine 212,489 0 212,489
Los Angeles 39,572 111,233 150,805
Riverside 139,251 49,285 188,536
San Diego 37,851 82,439 120,290
San Francisco 42,239 879 43,118
Santa Barbara 189,222 95,157 284,379
Santa Cruz 100,730 104,038 204,768
LBL 0 14,740 14,740
LLL 0 15,518 15,518
Other - UC 2,412 28,001 30,413
CSL 0 12,392 12,392
CSU n/a 64,295 64,295
Other-Network UC n/a 923,209 923,209
_______ ______ _____
1,516,386 1,913,864 3,430,250
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.8
Standard deviation in seconds 3.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.3
Standard deviation in seconds 2.1
2.0 COMMAND mode statistics:
____________________________
Longest session recorded (minutes:seconds) 1192
Average number of searches completed per session 2.8
Retrievals per search - median 2.0
Retrievals per search - average 86.4
Retrievals per search - standard deviation 1207.8
Percent of searches completed with 0 results 29.9%
Percent of searches entered that are long 4.7%
Percent of long searches completed
(includes partial results) 51.7%
Commands entered, by type, excluding errors:
Total Percentage
FIND 437,371 34.4%
DISPLAY (excluding automatic displays) 363,805 28.6%
ACFIND 150 0.0%
BROWSE 2,613 0.2%
SELECT 1,611 0.1%
HELP 20,598 1.6%
EXPLAIN 18,470 1.5%
SET/RESET 27,267 2.1%
SHOW 4,161 0.3%
AT 22,809 1.8%
ADD ON (AND, OR, AND NOT) 12,981 1.0%
LOGON or LOGOFF 252,230 19.9%
COMMENT 572 0.0%
SAVE 11,454 0.9%
USE 20,748 1.6%
OTHER 73,169 5.8%
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 71,794 15.9% 17,893 24.9% 13 104.7 476.8
AUTHOR 28,897 6.4% 6,788 23.5% 13 119.4 498.6
CORPORATE AUTH 4,473 1.0% 1,823 40.8% 22 603.3 4585.9
EXACT CA 288 0.1% 130 45.1% 64 167.1 553.5
TITLE WORD 115,092 25.4% 37,264 32.4% 6 58.3 632.6
EXACT TITLE 52,879 11.7% 17,565 33.2% 2 32.0 306.3
TITLE -> TW 10,197 2.3% 2,636 25.8% 10 59.9 248.0
TITLE -> XT 11,818 2.6% 5,616 47.5% 1 10.6 73.2
SUBJECT 42,581 9.4% 17,825 41.9% 51 437.5 3254.3
EXACT SUBJECT 2,032 0.4% 812 40.0% 84 470.2 1235.7
PERIODICAL 63,963 14.1% 14,775 23.1% 5 145.0 1617.7
EXACT PE 22,735 5.0% 3,844 16.9% 3 42.5 513.9
RPE 66 0.0% 34 51.5% 5 54.5 189.2
XRP 5 0.0% 2 40.0% 16 49.7 70.8
COMMENTS 95 0.0% 27 28.4% 2,202 2070.8 2011.6
LANGUAGE 2,537 0.6% 1,173 46.2% 26 564.7 7179.8
DATE 5,973 1.3% 2,083 34.9% 5 62.8 323.5
FORM 3,948 0.9% 1,195 30.3% 16 440.6 3986.8
NUMBER* 677 0.1% 206 30.4% 1 128.9 1415.2
MUSIC* 202 0.0% 105 52.0% 4 123.2 424.2
SERIES 6,658 1.5% 2,418 36.3% 6 114.8 1046.3
UNIFORM TITLE 158 0.0% 91 57.6% 38 332.4 910.4
Other indexes 5,745 1.3% 2,886 50.2% 1 19.5 129.5
* 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 23,325 5.5% 8,024 34.4% 4 94.9 948.9
Single 403,915 94.5% 120,029 29.7% 7 125.3 1459.0
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 285 11.9% 59 20.7% 11 58.8 126.8
CORPORATE AUTH 32 1.3% 14 43.8% 10 70.7 125.2
EXACT CA 14 0.6% 6 42.9% 12 82.3 110.9
SUBJECT 1,835 76.4% 454 24.7% 34 149.2 552.7
EXACT SUBJECT 195 8.1% 68 34.9% 35 232.0 677.1
UNIFORM TITLE 8 0.3% 4 50.0% 3 22.0 40.0
SERIES 33 1.4% 4 12.1% 6 50.6 93.0
By number of indexes:
Multiple 2 0.1% 0 0.0% 627 626.5 655.5
Single 2,472 99.9% 623 25.2% 30 136.1 512.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 8.9%
BRIEF 72.8%
LONG 10.1%
MARC 3.7%
FIELDS 1.6%
TAG 1.5%
PERIODICALS 0.0%
COMMENTS 0.0%
Other (includes BROWSE, ACFIND) 1.5%
3.0 Error, EXPLAIN and HELP statistics
__________________________________________________________
Percent of commands that contained errors 9.6%
Ten most frequent errors:
1. First word of command is invalid 29.2%
2. NS command - no next screen 25.6%
3. FIND command with invalid index name 12.4%
4. KW search in database w/o KW index 4.1%
5. DISPLAY command contains invalid word 3.1%
6. Search term missing from search command 2.3%
7. Valid command at an inappropriate time 1.8%
8. PS command - no previous screen 1.8%
9. DISPLAY command - no FIND results 1.6%
10. Max. # of ports to a Z39 db are in use 1.5%
11. All others 16.7%
Ten most frequent EXPLAIN requests:
1. GUIDE 22.4%
2. FIND 13.6%
3. INDEXES 6.7%
4. COMMAND WORDS 6.5%
5. Unrecognized term 6.2%
6. PASSWORDS 3.3%
7. DISPLAY 3.0%
8. DATABASES 2.6%
9. ADD-ON SEARCH 1.9%
10. LOCATE (PE DB) 1.9%
11. All others 31.8%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 18.9%
2. First word of command is invalid 14.9%
3. FIND command with invalid index name 10.8%
4. DISPLAY command - middle of >1 screen 4.2%
5. NS command - no next screen 3.0%
6. FIND command retrieves >1 book 2.8%
7. KW search in database w/o KW index 2.8%
8. DISPLAY command-first of >1 screen 2.6%
9. TW search with zero results 2.6%
10. DISPLAY command - last of >1 screen 2.3%
11. All others 34.9%
Ten most frequent SHOW requests:
1. HISTORY 28.1%
2. SEARCH 19.1%
3. GLOSSARY 12.3%
4. TIME 5.1%
5. SETTINGS 3.8%
6. MAIL STATUS 3.4%
7. NEWS 2.6%
8. DLA NEWS 1.6%
9. TIMEOUT SETTING 1.5%
10. MAIL SETTINGS 1.5%
11. All others 20.9%