MELVYL INSPEC DATABASES TELNET STATISTICS
Time period: 06/01/99 through 06/30/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Zero results may indicate no access to the database
Location Library Remote Total
________ _______ ______ _____
Berkeley 187 3,226 3,413
Davis 708 104 812
Irvine 826 0 826
Los Angeles 112 1,635 1,747
Riverside 90 119 209
San Diego 252 1,820 2,072
San Francisco 123 10 133
Santa Barbara 329 958 1,287
Santa Cruz 132 326 458
Lawrence Berkeley 0 539 539
Lawrence Livermore 0 981 981
Los Alamos 0 0 0
Other - UC 33 272 305
Other-Network UC n/a 2,132 2,132
_______ ______ _____
2,792 12,122 14,914
Relative use of INSPEC databases:
Number of Number of Number of
Sessions FIND commands Records Displayed
_________ _____________ _________________
INS (current) 9,386 24,954 234,078
INS90 1,819 3,301 19,337
INS85 1,475 2,720 15,946
INS80 1,229 2,374 13,873
INS69 1,005 2,344 19,564
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 417 1,197 7,479
2-4 a.m. 270 709 5,722
4-6 a.m. 281 794 4,917
6-8 a.m. 561 1,368 13,066
8-10 a.m. 1,444 3,339 21,083
10-12 a.m. 2,552 5,588 59,262
12-2 p.m. 2,237 5,140 36,653
2-4 p.m. 3,154 7,553 66,931
4-6 p.m. 1,976 5,001 46,069
6-8 p.m. 892 2,187 19,352
8-10 p.m. 649 1,577 11,995
10-12 p.m. 481 1,240 10,269
__________ __________ __________ _________________
Total: 14,914 35,693 302,798
1.2 FIND commands
__________________
Zero results may indicate no access to the database
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 387 7,576 7,963
Davis 1,792 302 2,094
Irvine 2,109 0 2,109
Los Angeles 289 3,941 4,230
Riverside 193 380 573
San Diego 646 4,074 4,720
San Francisco 301 29 330
Santa Barbara 816 2,378 3,194
Santa Cruz 324 776 1,100
Lawrence Berkeley 0 1,535 1,535
Lawrence Livermore 0 2,370 2,370
Los Alamos 0 0 0
Other - UC 59 673 732
Other-Network UC n/a 4,743 4,743
_______ ______ _____
6,916 28,777 35,693
1.3 Records displayed
______________________
Zero results may indicate no access to the database
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,573 72,732 76,305
Davis 19,134 969 20,103
Irvine 20,841 0 20,841
Los Angeles 1,884 38,799 40,683
Riverside 1,043 2,521 3,564
San Diego 3,565 27,421 30,986
San Francisco 3,045 94 3,139
Santa Barbara 7,798 21,930 29,728
Santa Cruz 1,290 5,772 7,062
Lawrence Berkeley 0 16,387 16,387
Lawrence Livermore 0 17,981 17,981
Los Alamos 0 0 0
Other - UC 226 5,057 5,283
Other-Network UC n/a 30,736 30,736
_______ ______ _____
62,399 240,399 302,798
1.4 Response time
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Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.2
Standard deviation in seconds 5.9
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 0.2
2.0 INSPEC Databases Detailed Statistics
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Median session length (minutes:seconds) 8:03
Average session length (minutes:seconds) 12:40
Longest session recorded (minutes:seconds) 357:37
Average number of searches completed per session 2.3
Retrievals per search - median 7.0
Retrievals per search - average 491.0
Retrievals per search - standard deviation 5798.1
Percent of searches completed with 0 results 24.9%
Percent of searches entered that are long 5.1%
Percent of long searches completed
(includes partial results) 65.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 32,424 30.3%
DISPLAY (excluding automatic displays) 39,228 36.7%
BROWSE 61 0.1%
SELECT 16 0.0%
HELP 1,272 1.2%
EXPLAIN 1,817 1.7%
SET/RESET 8,270 7.7%
SHOW 423 0.4%
ADD ON (AND, OR, AND NOT) 3,262 3.0%
LOGON or LOGOFF 14,044 13.1%
COMMENT 0 0.0%
SAVE 1,720 1.6%
USE 109 0.1%
OTHER 4,388 4.1%
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 AUTHOR 15,056 42.7% 3,394 22.5% 15 75.8 300.2
TITLE WORD 6,706 19.0% 2,448 36.5% 7 81.4 453.7
EXACT TITLE 191 0.5% 115 60.2% 1 38.5 121.6
JOURNAL 1,115 3.2% 416 37.3% 257 2855.2 9408.2
EXACT JOURNAL 290 0.8% 117 40.3% 67 877.8 2888.1
SUBJECT 1,791 5.1% 573 32.0% 27 445.6 1431.4
EXACT SUBJECT 56 0.2% 17 30.4% 381 3997.4 5688.1
THESAURUS 43 0.1% 7 16.3% 36 1946.5 3455.7
EXACT THESAURUS 29 0.1% 1 3.4% 1,669 3330.6 6746.3
KEYWORD 7,165 20.3% 1,252 17.5% 38 1663.0 12439.0
SUBFILE 62 0.2% 9 14.5% 12 39.8 71.3
FORM 155 0.4% 18 11.6% 26 123.0 413.5
DATE 741 2.1% 173 23.3% 8 185.2 689.5
ADDED 43 0.1% 15 34.9% 20 124.0 169.2
ARTICLE 0 0.0% 0 0.0% 0 0.0 0.0
AUTHOR AFFIL. 312 0.9% 63 20.2% 12 231.7 857.7
CONFERENCE 84 0.2% 38 45.2% 235 655.7 1369.5
LANGUAGE 21 0.1% 3 14.3% 32 145.3 182.0
CHEMICAL NAME 102 0.3% 21 20.6% 78 783.1 2312.6
ISSN 3 0.0% 2 66.7% 4,048 4048.0 0.0
ISBN 8 0.0% 7 87.5% 90 90.0 0.0
ID NUMBER 51 0.1% 25 49.0% 1 1.0 0.0
PERIODICAL 658 1.9% 172 26.1% 6 191.2 1336.9
EXACT PE 132 0.4% 26 19.7% 4 76.0 273.4
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 412 1.2% 112 27.2% 17 358.9 1932.7
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 3,243 10.2% 1,018 31.4% 6 147.7 880.5
Single 28,597 89.8% 6,953 24.3% 20 641.6 6795.6
BROWSEs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. BROWSEs No. Index Median Avg. Dev.
______ _______ ______ _______ ______ _______ _______
By index:
THESAURUS 54 88.5% 18 33.3% 2 12.1 29.7
EXACT THESAURUS 7 11.5% 3 42.9% 1 1.3 0.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.4%
SHORT 86.6%
LONG 1.8%
TAGS 0.5%
FIELDS 2.7%
BROWSE REVIEW 0.0%
BROWSE LONG 0.0%
PERIODICALS 2.6%
COMMENTS 0.0%
Other 2.4%
2.2 Error, EXPLAIN and HELP statistics
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Percent of commands that contained errors 10.1%
Ten most frequent errors:
1. NS command - no next screen 42.4%
2. First word of command is invalid 29.1%
3. FIND command with invalid index name 7.5%
4. DISPLAY command contains invalid word 2.9%
5. PS command - no previous screen 1.7%
6. DISPLAY command-record numbers too large 1.3%
7. NS of SHOW/EXP command-no next screen 1.3%
8. Search term missing from search command 1.3%
9. Valid command at an inappropriate time 1.2%
10. Invalid SET DB INS command issued 1.0%
11. All others 10.4%
Ten most frequent EXPLAIN requests:
1. FIND (INSPEC DBS) 13.9%
2. INSPEC DATABASES 12.2%
3. GUIDE (INSPEC DBS) 9.6%
4. INSPEC BACKFILES 7.5%
5. LOCATE (INS/PSY DBS) 7.3%
6. INDEXES (INSPEC DBS) 5.2%
7. Unrecognized term 4.5%
8. COMMANDS (INS/PSY/ABI/BIO DBS) 4.0%
9. DATABASES 3.5%
10. MAIL 3.4%
11. All others 28.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 24.4%
2. First word of command is invalid 12.8%
3. FIND command with invalid index name 7.2%
4. FIND command with zero results 6.9%
5. DISPLAY command - middle of >1 screen 5.6%
6. DISPLAY command-first of >1 screen 5.3%
7. FIND command retrieves >1 book 5.2%
8. NS command - no next screen 4.0%
9. DISPLAY command - last of >1 screen 3.9%
10. DISPLAY command-complete in one screen 3.5%
11. All others 21.0%
Ten most frequent SHOW requests:
1. HISTORY 62.2%
2. MAIL STATUS 9.9%
3. SEARCH 7.6%
4. SETTINGS (INS/PSY DBS) 4.3%
5. GLOSSARY 3.6%
6. SYSTEM NEWS 2.5%
7. INSPEC NEWS 2.3%
8. INSPEC LOADING STATISTICS 1.5%
9. LIBRARY LOCATIONS 1.3%
10. SYSTEM5 NEWS 0.8%
11. All others 4.1%