MELVYL IAC DATABASES TELNET STATISTICS
Time period: 01/20/01 through 01/26/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 128 379 507
Davis 208 0 208
Irvine 166 0 166
Los Angeles 16 91 107
Riverside 42 25 67
San Diego 44 45 89
San Francisco 67 0 67
Santa Barbara 72 46 118
Santa Cruz 93 36 129
LBL 0 8 8
LLL 0 7 7
Los Alamos n/a 1 1
Other - UC 6 51 57
Stanford 64
Other-Network UC n/a 184 184
_______ ______ _____
842 873 1,779
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 19 44 343
2-4 a.m. 17 66 402
4-6 a.m. 8 18 133
6-8 a.m. 29 72 992
8-10 a.m. 160 393 4,090
10-12 a.m. 282 721 7,626
12-2 p.m. 351 877 16,578
2-4 p.m. 378 1,066 10,166
4-6 p.m. 257 891 7,249
6-8 p.m. 115 270 3,035
8-10 p.m. 83 343 4,154
10-12 p.m. 80 240 5,139
__________ __________ __________ _________________
Total: 1,779 5,001 59,907
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 359 919 1,278
Davis 536 1 537
Irvine 523 0 523
Los Angeles 65 257 322
Riverside 119 71 190
San Diego 145 119 264
San Francisco 233 0 233
Santa Barbara 188 130 318
Santa Cruz 268 172 440
LBL 0 25 25
LLL 0 16 16
Los Alamos n/a 1 1
Other - UC 16 115 131
Stanford 161
Other-Network UC n/a 562 562
_______ ______ _____
2,452 2,388 5,001
Number of FIND commands by database
MAGS database 4,440
NEWS database 433
COMP database 128
Total number of FIND commands 5,001
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,515 10,957 14,472
Davis 3,954 0 3,954
Irvine 3,645 0 3,645
Los Angeles 818 2,725 3,543
Riverside 1,122 596 1,718
San Diego 732 5,960 6,692
San Francisco 2,914 0 2,914
Santa Barbara 1,309 1,328 2,637
Santa Cruz 2,203 1,276 3,479
LBL 0 229 229
LLL 0 1,542 1,542
Los Alamos n/a 49 49
Other - UC 95 6,100 6,195
Stanford 188
Other-Network UC n/a 6,746 6,746
_______ ______ _____
20,307 37,508 58,003
Number of Records Displayed by database:
MAGS database 49,954
NEWS database 3,383
COMP database 6,570
Total number of Records Displayed 58,003
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.0%
Percent of NEWS sessions 9.4%
Percent of COMP sessions 3.6%
Percent of searches done in the MAGS database 88.8%
Percent of searches done in the NEWS database 8.7%
Percent of searches done in the COMP database 2.6%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.6
Standard deviation in seconds 1.9
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.9
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:05
Average session length (minutes:seconds) 12:06
Longest session recorded (minutes:seconds) 511:21
Average number of searches completed per session 2.8
Retrievals per search - median 5.0
Retrievals per search - average 472.5
Retrievals per search - standard deviation 4426.1
Percent of searches completed with 0 results 30.4%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 61.2%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 4,134 29.0%
DISPLAY (excluding automatic displays) 5,396 37.9%
HELP 449 3.1%
EXPLAIN 284 2.0%
SET/RESET 575 4.0%
SHOW 55 0.4%
ADD ON (AND, OR, AND NOT) 306 2.1%
LOGON or LOGOFF 2,053 14.4%
COMMENT 0 0.0%
SAVE 201 1.4%
USE 2 0.0%
OTHER 800 5.6%
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 793 18.5% 229 28.9% 9 70.2 294.5
TITLE WORD 926 21.7% 281 30.3% 11 508.5 3481.1
EXACT TITLE 96 2.2% 58 60.4% 4 94.4 336.1
JOURNAL 186 4.4% 83 44.6% 1,469 7227.7 16257.4
EXACT JOURNAL 78 1.8% 39 50.0% 410 2981.6 8853.7
SUBJECT 896 21.0% 325 36.3% 41 361.9 2850.1
EXACT SUBJECT 12 0.3% 5 41.7% 11 423.6 1024.5
KEYWORD 1,085 25.4% 228 21.0% 17 763.7 7051.9
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 5 0.1% 1 20.0% 2 1.8 1.0
DATE 67 1.6% 23 34.3% 7 123.7 705.1
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 96 2.2% 25 26.0% 9 228.0 676.0
EXACT PE 14 0.3% 3 21.4% 2 6.7 15.4
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 21 0.5% 5 23.8% 199 658.5 857.9
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 171 4.2% 55 32.2% 8 724.5 6141.8
Single 3,930 95.8% 1,193 30.4% 17 716.2 5452.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
SHORT 62.1%
LONG 1.1%
FIELDS 1.3%
PERIODICALS 1.3%
COMMENTS 0.0%
Other 32.1%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:15
Average session length (minutes:seconds) 17:31
Longest session recorded (minutes:seconds) 335:59
Average number of searches completed per session 2.0
Retrievals per search - median 5.0
Retrievals per search - average 214.4
Retrievals per search - standard deviation 627.5
Percent of searches completed with 0 results 33.6%
Percent of searches entered that are long 0.8%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 107 25.0%
DISPLAY (excluding automatic displays) 130 30.4%
HELP 11 2.6%
EXPLAIN 13 3.0%
SET/RESET 24 5.6%
SHOW 2 0.5%
ADD ON (AND, OR, AND NOT) 21 4.9%
LOGON or LOGOFF 88 20.6%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 32 7.5%
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 13 11.2% 9 69.2% 1 2.8 3.5
TITLE WORD 27 23.3% 9 33.3% 10 235.6 396.9
EXACT TITLE 1 0.9% 1 100% 0 0.0 0.0
JOURNAL 7 6.0% 6 85.7% 644 644.0 0.0
EXACT JOURNAL 3 2.6% 1 33.3% 70 70.0 0.0
SUBJECT 21 18.1% 7 33.3% 13 249.1 669.0
EXACT SUBJECT 3 2.6% 0 0.0% 370 436.0 188.9
KEYWORD 35 30.2% 10 28.6% 20 540.9 1182.7
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 4 3.4% 0 0.0% 469 443.5 366.0
DATE 2 1.7% 0 0.0% 70 70.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT PE 0 0.0% 0 0.0% 0 0.0 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 9 8.4% 2 22.2% 289 326.3 313.6
Single 98 91.6% 39 39.8% 14 350.9 866.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 12.6%
SHORT 48.1%
LONG 2.8%
FIELDS 2.3%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 34.1%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 979
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 79
displays or when any of these paging options is set.
TEXT included with MAIL commands 235
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:19
Average session length (minutes:seconds) 9:29
Longest session recorded (minutes:seconds) 98:05
Average number of searches completed per session 2.6
Retrievals per search - median 6.0
Retrievals per search - average 2335.5
Retrievals per search - standard deviation 40687
Percent of searches completed with 0 results 28.8%
Percent of searches entered that are long 1.8%
Percent of long searches completed
(includes partial results) 37.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 385 31.1%
DISPLAY (excluding automatic displays) 325 26.2%
HELP 52 4.2%
EXPLAIN 36 2.9%
SET/RESET 78 6.3%
SHOW 18 1.5%
ADD ON (AND, OR, AND NOT) 48 3.9%
LOGON or LOGOFF 193 15.6%
COMMENT 0 0.0%
SAVE 1 0.1%
USE 1 0.1%
OTHER 102 8.2%
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 14 3.5% 8 57.1% 13 255.3 579.8
TITLE WORD 180 45.2% 35 19.4% 19 340.4 1579.4
EXACT TITLE 1 0.3% 1 100% 0 0.0 0.0
JOURNAL 4 1.0% 3 75.0% 839782 839782 0.0
EXACT JOURNAL 7 1.8% 2 28.6% 156 1315.2 2677.4
SUBJECT 110 27.6% 43 39.1% 61 1137.6 4963.0
EXACT SUBJECT 1 0.3% 0 0.0% 2 2.0 0.0
KEYWORD 71 17.8% 19 26.8% 30 565.0 1975.1
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 4 1.0% 1 25.0% 13 58.0 85.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 3 0.8% 0 0.0% 33 40.7 40.1
EXACT PE 3 0.8% 1 33.3% 22 22.0 9.9
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 17 4.5% 3 17.6% 79 507.6 1611.9
Single 364 95.5% 107 29.4% 25 3848.1 52429.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.2%
SHORT 44.1%
LONG 2.8%
FIELDS 1.5%
PERIODICALS 1.4%
COMMENTS 0.0%
Other 44.0%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 12.3%
Ten most frequent errors:
1. First word of command is invalid 37.8%
2. NS command - no next screen 25.2%
3. FIND command with invalid index name 12.9%
4. PS command - no previous screen 4.0%
5. Valid command at an inappropriate time 2.6%
6. Search term missing from search command 2.6%
7. DISPLAY command contains invalid word 2.5%
8. DISPLAY command-record numbers too large 1.3%
9. DISPLAY command - no FIND results 0.9%
10. MAIL command issued w/o email address 0.9%
11. All others 9.2%
Ten most frequent EXPLAIN requests:
1. GUIDE 25.8%
2. LOCATE (ARTICLE DBS) 14.4%
3. FIND 10.8%
4. COMMANDS 9.0%
5. MAGS DATABASE 7.2%
6. INDEXES 4.8%
7. Unrecognized term 4.8%
8. DISPLAYS (IAC DBS) 3.3%
9. MAIL 2.1%
10. NEWS DATABASE 1.8%
11. All others 15.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 28.4%
2. First word of command is invalid 20.0%
3. FIND command with invalid index name 10.1%
4. FIND command with zero results 7.7%
5. DISPLAY command - middle of >1 screen 4.4%
6. DISPLAY command-first of >1 screen 3.6%
7. DISPLAY command-complete in one screen 3.2%
8. NS command - no next screen 3.1%
9. Valid command at an inappropriate time 1.9%
10. PS command - no previous screen 1.8%
11. All others 16.0%
Ten most frequent SHOW requests:
1. HISTORY 53.4%
2. SEARCH 28.8%
3. GLOSSARY 6.8%
4. SYSTEM NEWS 5.5%
5. IAC NEWS 2.7%
6. UCSF NEWS 1.4%
7. LIBRARY NEWS 1.4%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)