MELVYL IAC DATABASES TELNET STATISTICS
Time period: 11/10/01 through 11/16/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 170 279 449
Davis 191 0 191
Irvine 128 0 128
Los Angeles 0 36 36
Riverside 22 11 33
San Diego 9 34 43
San Francisco 38 0 38
Santa Barbara 14 20 34
Santa Cruz 15 19 34
LBL 0 19 19
LLL 0 2 2
Los Alamos n/a 0 0
Other - UC 8 66 74
Stanford 7
Other-Network UC n/a 110 110
_______ ______ _____
595 596 1,198
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 27 52 253
2-4 a.m. 17 43 736
4-6 a.m. 5 11 126
6-8 a.m. 14 42 533
8-10 a.m. 104 298 4,116
10-12 a.m. 201 680 8,872
12-2 p.m. 243 655 6,986
2-4 p.m. 240 608 7,829
4-6 p.m. 181 483 4,217
6-8 p.m. 66 260 2,742
8-10 p.m. 63 156 1,672
10-12 p.m. 37 87 928
__________ __________ __________ _________________
Total: 1,198 3,375 39,010
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 540 785 1,325
Davis 408 0 408
Irvine 411 0 411
Los Angeles 0 71 71
Riverside 49 42 91
San Diego 13 112 125
San Francisco 81 0 81
Santa Barbara 25 43 68
Santa Cruz 188 68 256
LBL 0 70 70
LLL 0 8 8
Los Alamos n/a 0 0
Other - UC 19 161 180
Stanford 13
Other-Network UC n/a 268 268
_______ ______ _____
1,734 1,628 3,375
Number of FIND commands by database
MAGS database 2,988
NEWS database 284
COMP database 103
Total number of FIND commands 3,375
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 6,052 8,501 14,553
Davis 4,041 0 4,041
Irvine 2,786 0 2,786
Los Angeles 0 994 994
Riverside 340 635 975
San Diego 65 3,163 3,228
San Francisco 1,701 0 1,701
Santa Barbara 350 318 668
Santa Cruz 550 679 1,229
LBL 0 1,681 1,681
LLL 0 116 116
Los Alamos n/a 0 0
Other - UC 158 1,355 1,513
Stanford 11
Other-Network UC n/a 5,503 5,503
_______ ______ _____
16,043 22,945 38,999
Number of Records Displayed by database:
MAGS database 33,519
NEWS database 5,021
COMP database 470
Total number of Records Displayed 38,999
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 85.6%
Percent of NEWS sessions 9.9%
Percent of COMP sessions 4.4%
Percent of searches done in the MAGS database 88.5%
Percent of searches done in the NEWS database 8.4%
Percent of searches done in the COMP database 3.1%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.7
Standard deviation in seconds 2.6
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.2
Standard deviation in seconds 2.6
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:04
Average session length (minutes:seconds) 13:13
Longest session recorded (minutes:seconds) 460:56
Average number of searches completed per session 2.9
Retrievals per search - median 4.0
Retrievals per search - average 454.0
Retrievals per search - standard deviation 4825.7
Percent of searches completed with 0 results 30.6%
Percent of searches entered that are long 1.3%
Percent of long searches completed
(includes partial results) 55.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,800 29.1%
DISPLAY (excluding automatic displays) 3,693 38.4%
HELP 295 3.1%
EXPLAIN 233 2.4%
SET/RESET 419 4.4%
SHOW 46 0.5%
ADD ON (AND, OR, AND NOT) 188 2.0%
LOGON or LOGOFF 1,317 13.7%
COMMENT 0 0.0%
SAVE 136 1.4%
USE 3 0.0%
OTHER 483 5.0%
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 568 19.4% 168 29.6% 9 65.6 296.0
TITLE WORD 740 25.3% 217 29.3% 9 441.7 3183.5
EXACT TITLE 186 6.4% 115 61.8% 2 59.5 424.9
JOURNAL 96 3.3% 48 50.0% 470 2516.0 5528.6
EXACT JOURNAL 82 2.8% 42 51.2% 900 6814.8 10998.2
SUBJECT 559 19.1% 194 34.7% 30 214.3 564.2
EXACT SUBJECT 29 1.0% 8 27.6% 102 213.1 293.6
KEYWORD 527 18.0% 96 18.2% 26 1191.1 11123.8
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 4 0.1% 0 0.0% 53 1293.5 2510.4
DATE 33 1.1% 12 36.4% 6 85.9 184.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 51 1.7% 6 11.8% 21 1230.9 6022.3
EXACT PE 26 0.9% 3 11.5% 3 9.3 16.0
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 22 0.8% 7 31.8% 84 100.9 101.1
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 134 4.8% 50 37.3% 6 100.5 557.6
Single 2,648 95.2% 812 30.7% 16 706.9 6106.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.7%
SHORT 60.5%
LONG 1.8%
FIELDS 1.6%
PERIODICALS 1.3%
COMMENTS 0.0%
Other 32.0%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 4:39
Average session length (minutes:seconds) 8:15
Longest session recorded (minutes:seconds) 25:08
Average number of searches completed per session 1.9
Retrievals per search - median 1.0
Retrievals per search - average 122.1
Retrievals per search - standard deviation 460.0
Percent of searches completed with 0 results 40.8%
Percent of searches entered that are long 2.9%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 95 33.6%
DISPLAY (excluding automatic displays) 77 27.2%
HELP 1 0.4%
EXPLAIN 11 3.9%
SET/RESET 28 9.9%
SHOW 1 0.4%
ADD ON (AND, OR, AND NOT) 8 2.8%
LOGON or LOGOFF 52 18.4%
COMMENT 0 0.0%
SAVE 1 0.4%
USE 0 0.0%
OTHER 9 3.2%
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 36 35.6% 25 69.4% 5 76.4 234.7
TITLE WORD 21 20.8% 9 42.9% 6 47.8 94.4
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1 1.0% 0 0.0% 3,450 3450.0 0.0
SUBJECT 6 5.9% 4 66.7% 7 7.0 8.5
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 31 30.7% 5 16.1% 12 257.6 578.3
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 2 2.0% 0 0.0% 8 7.5 3.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 3 3.0% 1 33.3% 6 6.0 0.0
EXACT PE 1 1.0% 0 0.0% 3 3.0 0.0
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 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 6 6.3% 2 33.3% 5 5.0 3.7
Single 89 93.7% 40 44.9% 10 236.0 645.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.0%
SHORT 58.2%
LONG 0.0%
FIELDS 0.7%
PERIODICALS 2.0%
COMMENTS 0.0%
Other 37.3%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 719
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 49
displays or when any of these paging options is set.
TEXT included with MAIL commands 162
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:57
Average session length (minutes:seconds) 11:21
Longest session recorded (minutes:seconds) 99:22
Average number of searches completed per session 2.3
Retrievals per search - median 2.0
Retrievals per search - average 3847.6
Retrievals per search - standard deviation 52723
Percent of searches completed with 0 results 36.0%
Percent of searches entered that are long 2.1%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 258 33.5%
DISPLAY (excluding automatic displays) 225 29.2%
HELP 30 3.9%
EXPLAIN 15 1.9%
SET/RESET 62 8.1%
SHOW 5 0.6%
ADD ON (AND, OR, AND NOT) 26 3.4%
LOGON or LOGOFF 111 14.4%
COMMENT 0 0.0%
SAVE 10 1.3%
USE 0 0.0%
OTHER 28 3.6%
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 AUTHOR 28 10.5% 14 50.0% 15 274.5 604.1
TITLE WORD 90 33.7% 26 28.9% 10 583.3 3767.5
EXACT TITLE 7 2.6% 5 71.4% 2 1.5 0.7
JOURNAL 3 1.1% 2 66.7% 866232 866232 0.0
EXACT JOURNAL 4 1.5% 4 100% 0 0.0 0.0
SUBJECT 68 25.5% 29 42.6% 8 129.4 224.7
EXACT SUBJECT 3 1.1% 2 66.7% 12 12.0 0.0
KEYWORD 50 18.7% 13 26.0% 8 4217.4 24815.9
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.4% 0 0.0% 2 2.0 0.0
DATE 8 3.0% 1 12.5% 3 177.7 291.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 4 1.5% 0 0.0% 34 32.3 31.6
EXACT PE 1 0.4% 0 0.0% 4 4.0 0.0
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 0 0.0% 0 0.0% 0 0.0 0.0
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 12 4.7% 2 16.7% 2 124.8 252.8
Single 243 95.3% 92 37.9% 10 7068.8 71487.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.1%
SHORT 46.6%
LONG 2.8%
FIELDS 3.3%
PERIODICALS 1.4%
COMMENTS 0.0%
Other 39.9%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.9%
Ten most frequent errors:
1. First word of command is invalid 35.7%
2. NS command - no next screen 24.1%
3. FIND command with invalid index name 14.6%
4. PS command - no previous screen 4.3%
5. DISPLAY command contains invalid word 2.9%
6. Valid command at an inappropriate time 2.8%
7. Search term missing from search command 2.1%
8. NS of SHOW/EXP command-no next screen 1.0%
9. DISPLAY command - no FIND results 1.0%
10. Add-on search, no index name after verb 0.8%
11. All others 10.7%
Ten most frequent EXPLAIN requests:
1. LOCATE (ARTICLE DBS) 23.9%
2. GUIDE 17.8%
3. MAGS DATABASE 8.9%
4. INDEXES 7.3%
5. FIND 6.9%
6. COMMANDS 6.2%
7. Unrecognized term 5.0%
8. MAIL 2.7%
9. DATABASES 2.7%
10. ADDON SEARCH 2.7%
11. All others 15.8%
Ten most frequent HELP situations:
1. Help requested from SET DB command 26.0%
2. First word of command is invalid 20.0%
3. FIND command with invalid index name 10.4%
4. DISPLAY command-complete in one screen 5.3%
5. DISPLAY command-first of >1 screen 4.6%
6. FIND command with zero results 4.1%
7. NS command - no next screen 3.4%
8. FIND command retrieves >1 book 3.2%
9. DISPLAY command - middle of >1 screen 3.1%
10. DISPLAY command - last of >1 screen 2.6%
11. All others 17.3%
Ten most frequent SHOW requests:
1. SEARCH 28.8%
2. HISTORY 25.0%
3. IAC NEWS 15.4%
4. MAIL SETTINGS 7.7%
5. SYSTEM NEWS 5.8%
6. LIBRARY NEWS 3.8%
7. MAIL STATUS 3.8%
8. LOCATION 1.9%
9. UCB INFORMATION 1.9%
10. 0242 1.9%
11. All others 3.8%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)